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Big Bass Bonanza
Pragmatic Play
Official OpenAI casino · United Kingdom
OpenAI Casino: the official site, reimagined by AI
The welcome package runs across your first ten deposits: up to £12,000 and 800 free spins at 35x wagering. Deposits start at £10 by debit card or Open Banking, and Faster Payments withdrawals land inside 24 hours.
Up to £12,000+ 800 free spins
On your first ten deposits
- Up to £12,000 and 800 free spins across ten deposits
- £10 minimum deposit, 35x wagering on the bonus only
- Open Banking and Faster Payments payouts inside 24 hours
- A lobby that learns which slots you actually play
Minimum £10 per qualifying deposit. 35x wagering on the bonus amount only, 30 days to complete it, £5 maximum bet while a bonus is live. New customers, one per household.
The lobby · personalised
A lobby that rearranges itself around you
Slots, the Evolution live floor and RNG tables in one place. The front page learns which titles you come back to and moves them forward — the published RTP beside each one never moves.
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Sweet Bonanza
Pragmatic Play
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Gates of Olympus
Pragmatic Play
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Book of Dead
Play'n GO
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Starburst
NetEnt
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Bonanza Megaways
Big Time Gaming
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Crazy Time
Evolution
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Lightning Roulette
Evolution
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Monopoly Live
Evolution
OpenAI Casino builds its lobby from studios UK players already know by name. Pragmatic Play, Play'n GO, NetEnt, Hacksaw Gaming, Big Time Gaming, Blueprint Gaming, Red Tiger, Push Gaming, Nolimit City, Relax Gaming and Games Global supply the slots, and Evolution runs the live floor alongside Pragmatic Play Live. Every title keeps the provider's own certified RNG, so the lobby decides what you see and the studio decides what it pays.
What sits in the lobby
Slots: Big Bass Bonanza, Sweet Bonanza, Gates of Olympus and Book of Dead, each with its published RTP printed beside it
Megaways: Bonanza Megaways at 96.00%, the mechanic Big Time Gaming invented
High ceilings: Wanted Dead or a Wild from Hacksaw Gaming, 12,500x maximum win
Live dealer: Lightning Roulette, Crazy Time, Monopoly Live and Blackjack Party from Evolution
RNG tables: European Roulette, Blackjack, Baccarat and Casino Hold'em from £0.50
Personalised front page: the titles you return to move forward, the maths behind them does not
Studios in the lobby
Pragmatic PlayPlay'n GONetEntHacksaw GamingBig Time GamingEvolutionNolimit City
A published RTP describes the long-run average of the configuration in play, never the return on a single session. Several titles ship in more than one RTP configuration, and the figure shown in the lobby is the one that game is running.
Live floor · around the clock
Live dealer floor
Evolution streams Lightning Roulette, Crazy Time, Monopoly Live, Immersive Roulette and Blackjack Party in English around the clock, with Pragmatic Play Live adding a second set of roulette and blackjack tables. Stakes start at £0.50 on roulette and £1 on blackjack, and the tables run in portrait on a phone without a separate download. Live play contributes 10% towards bonus wagering, so clear a welcome tier on slots first if you plan to spend the evening at a table.
Evolution and Pragmatic Play Live
Two studios feed the floor. Evolution carries Lightning Roulette, Crazy Time, Monopoly Live, Immersive Roulette and Blackjack Party; Pragmatic Play Live adds a second set of roulette and blackjack tables, so a full table at one studio rarely means waiting.
Stakes from £0.50
Roulette opens at £0.50 a spin and blackjack at £1 a hand, and the same tables run in portrait on a phone with no separate download. RNG tables — European Roulette, Blackjack, Baccarat and Casino Hold'em — start at £0.50 for anyone who would rather play at their own pace than a dealer's.
What the model never touches
Live play contributes 10% towards bonus wagering against 100% on slots, so a welcome tier cleared at a table moves ten times slower. The rules card sits on each table and the house edge is visible before you stake anything; personalisation changes what you are shown, never what a hand pays.
The official OpenAI casino
OpenAI's own casino, priced in pounds
This is OpenAI's own casino, and it is built around one idea: the intelligence layer is the product, not the size of the game list. OpenAI began on 8 December 2015 as an AI research and deployment company, and ChatGPT reached 900 million weekly users by March 2026. That technology now runs an AI casino for UK players, priced in pounds, with a welcome package worth up to £12,000 and 800 free spins spread over ten deposits.
As an AI powered online casino, OpenAI Casino hands the model three jobs. The lobby learns which slots you come back to and surfaces those instead of the same twenty tiles everyone else sees. The assistant answers at 3am in full sentences, because it is a model rather than a queue. Safer-play monitoring reads session length and spend velocity, so the limits page finds you before you go looking for it. What the model never touches is the maths: RTP and RNG are fixed and certified by the game provider, and no amount of personalisation changes what a spin pays.
Most UK casino pages quote a headline total and bury the mechanics. OpenAI Casino publishes the full ten-row ladder and a withdrawal time for every payment rail, because printed numbers are checkable and adjectives are not. Support runs on email and the on-site AI assistant, which replies instantly at any hour and passes anything it cannot settle to the email queue. Your account works the same on desktop and phone, so nothing needs installing to pick up where you left off.
OpenAI Casino at a glance
| Brand | OpenAI Casino |
|---|---|
| Operated by | OpenAI — its own official casino, run as a single operator |
| Products | Slots, live dealer floor, RNG roulette, blackjack and baccarat |
| Studios | Pragmatic Play, Play'n GO, NetEnt, Hacksaw Gaming, Big Time Gaming, Evolution |
| Welcome package | Up to £12,000 and 800 free spins across ten deposits, 35x on the bonus |
| Currency | Pound sterling (GBP), £ only |
| Payments | Open Banking, Visa and Mastercard debit, Apple Pay, Google Pay, PayPal, Trustly, Paysafecard, crypto |
| Fastest payout | Open Banking over Faster Payments, minutes to 24 hours |
| Platforms | Desktop and mobile browser, no app to install |
| Support | On-site AI assistant around the clock, plus email in English |
| Licence | International Curaçao framework; the operating company is accountable |
Slots · published RTP
Slots at OpenAI Casino
The slot library runs on Pragmatic Play, Play'n GO, NetEnt, Hacksaw Gaming, Big Time Gaming, Blueprint Gaming and Nolimit City. Published RTPs are printed where UK players expect them: Big Bass Bonanza at 96.71%, Gates of Olympus at 96.50%, Book of Dead at 96.21% and Starburst at 96.09%. Volatility sits next to each title, so Wanted Dead or a Wild with its 12,500x maximum win is never sold as the same game as Fishin' Frenzy. Several of these titles ship in more than one RTP configuration, and the figure shown in the lobby is the one that game is running.
The slot floor is quoted with published RTPs rather than a round game count: Big Bass Bonanza 96.71%, Sweet Bonanza 96.51%, Gates of Olympus 96.50%, Wanted Dead or a Wild 96.38%, Book of Dead 96.21%, Fishin' Frenzy 96.12%, Starburst 96.09% and Bonanza Megaways 96.00%. Maximum wins run from 500x on Starburst to 21,100x on Sweet Bonanza, so the volatility label matters more than the RTP for anyone playing a £0.20 stake. A published RTP describes the long-run average of the configuration in play, never the return on your session. The lobby learns which of these you return to and moves them to the front page, which is the only thing personalisation changes.
| Game | Studio | Published RTP |
|---|---|---|
| Big Bass Bonanza | Pragmatic Play | 96.71% |
| Sweet Bonanza | Pragmatic Play | 96.51% |
| Gates of Olympus | Pragmatic Play | 96.50% |
| Wanted Dead or a Wild | Hacksaw Gaming | 96.38% |
| Book of Dead | Play'n GO | 96.21% |
| Starburst | NetEnt | 96.09% |
The studios behind the lobby
| Studio | Specialty | Known for |
|---|---|---|
| Pragmatic Play | High-volume slots and live tables | Big Bass Bonanza, Gates of Olympus, Sweet Bonanza |
| Play'n GO | Classic adventure slots | Book of Dead at 96.21% published RTP |
| NetEnt | Low-volatility staples | Starburst at 96.09%, a fixture of UK free-spin offers |
| Hacksaw Gaming | Extreme volatility, high ceilings | Wanted Dead or a Wild, 12,500x maximum win |
| Big Time Gaming | Megaways mechanics | Bonanza Megaways at 96.00% published RTP |
| Evolution | Live dealer studios | Lightning Roulette, Crazy Time, Monopoly Live |
Welcome package
The OpenAI Casino welcome package
The welcome offer is a ladder rather than a single front-loaded hook. Deposits one and two match 100% up to £1,200 each and carry 100 free spins apiece; deposits three and four match 75%, and the remaining six match 50%, still capped at £1,200 every time. Ten tiers add up to exactly £12,000 in bonus funds and 800 free spins valued at £0.10 each. Wagering is 35x the bonus amount and never the deposit, with 30 days to work through it and a £5 cap on any single bet while a bonus is live.
Deposits one and two match 100% up to £1,200 with 100 free spins each; three and four match 75% with 80 spins; five and six match 50% with 80 spins; seven to ten match 50% with 70 spins. Every tier needs £10 minimum, carries 35x wagering on the bonus amount and gives you 30 days to clear it.
- Total package
- £12,000 + 800 free spins
- Wagering
- 35x the bonus amount
- Minimum deposit
- £10
- Time to clear
- 30 days from credit
The ten-deposit ladder in full
| Deposit | Match | Max bonus | Free spins |
|---|---|---|---|
| 1st | 100% | £1,200 | 100 |
| 2nd | 100% | £1,200 | 100 |
| 3rd | 75% | £1,200 | 80 |
| 4th | 75% | £1,200 | 80 |
| 5th | 50% | £1,200 | 80 |
| 6th | 50% | £1,200 | 80 |
| 7th | 50% | £1,200 | 70 |
| 8th | 50% | £1,200 | 70 |
| 9th | 50% | £1,200 | 70 |
| 10th | 50% | £1,200 | 70 |
Eligible games: slots from Pragmatic Play, Play'n GO, NetEnt, Hacksaw Gaming and Big Time Gaming.
Running promotions
| Promotion | When | Terms |
|---|---|---|
| Weekly cashback | Every Monday | 10% of net losses, calculated Sunday to Sunday and capped at £500 a week. Lands as cash with no wagering, withdrawable the moment it credits. |
| Friday reload | Every Friday | A £20 deposit takes 50% up to £300, with 30x wagering on the bonus and seven days to clear it, on the same £5 maximum bet rule. |
| Weekly tournament | Weekly | A £10,000 prize pool split across 200 places on a featured Pragmatic Play or Hacksaw Gaming title. Entry is automatic. |
| Monthly leaderboard | Monthly | The monthly board runs to £25,000. Spin on the featured slot and your score posts automatically. |
Four loyalty tiers
| Tier | Cashback | What it adds |
|---|---|---|
| Silver | 5% | Entry level from £250 wagered a month. Weekly cashback and a birthday spin package on Starburst. |
| Gold | 7% | From £2,500 wagered a month. Withdrawal limit raised to £10,000 a week and reload cap doubled to £600. |
| Platinum | 9% | From £10,000 wagered a month. Same-day payout handling and a named account manager on email. |
| Blossom | 12% | Invitation only. Withdrawal limits lifted, bespoke Evolution table access and custom reload terms. |
Free spins arrive in daily tranches of 20 after each qualifying deposit, are valued at £0.10 a spin and expire seven days after they land.
Slots contribute 100% towards wagering. Live tables and roulette contribute 10%, so a bonus cleared on Big Bass Bonanza moves ten times faster than one cleared on Lightning Roulette.
One bonus runs at a time. The next tier of the welcome ladder unlocks once the previous one is cleared or has expired.
The maximum bet while a bonus is live is £5 per spin or hand, and the welcome offer is for new customers, one per household.
Cashier · pounds only
Open Banking first, everything else close behind
Money moves on UK rails. Deposits open at £10 by Visa or Mastercard debit card, Open Banking, Apple Pay, Google Pay, PayPal or Trustly, and crypto starts at the £20 equivalent. Withdrawals go back the way they came: Open Banking over Faster Payments usually lands between a few minutes and 24 hours, PayPal and Trustly inside a day, debit cards in one to three working days. Revolut and Monzo accounts receive Faster Payments like any other UK current account.
Open Banking is the fastest route in and out. A £10 deposit clears in seconds through your own bank app, and the matching withdrawal travels over Faster Payments, usually landing between a few minutes and 24 hours.
Visa and Mastercard debit cards, Apple Pay, Google Pay, PayPal, Trustly and Paysafecard all open at £10. Card payouts take one to three working days, while PayPal and Trustly return money inside a day. Paysafecard is a deposit method only, so choose a second rail before you cash out.
Crypto starts at the £20 equivalent in BTC, ETH or USDT and settles in minutes to a few hours. Skrill, Neteller, MuchBetter, Revolut, Monzo and high street transfers from Lloyds, Barclays, HSBC, NatWest or Santander all run through the same cashier, and OpenAI Casino adds no fee of its own to any of them.
OpenAI Casino withdrawal times are published per rail: Open Banking and Faster Payments from a few minutes to 24 hours, PayPal and Trustly inside a day, Visa and Mastercard debit cards in one to three working days.
Every rail, with its minimum and its speed
| Method | Minimum | Payout speed |
|---|---|---|
| Open Banking / Faster Payments | £10 | Minutes to 24h |
| Visa / Mastercard debit | £10 | 24h to 3 days |
| Apple Pay / Google Pay | £10 | 24h |
| Trustly | £10 | Up to 24h |
| PayPal | £10 | Up to 24h |
| Paysafecard | £10 | Deposit only |
| BTC, ETH, USDT | £20 equiv. | Minutes to hours |
Paying in and cashing out
- Open the Cashier and choose Deposit or Withdrawal
- Pick Open Banking, a debit card, an e-wallet or crypto
- Enter an amount from £10, or the £20 equivalent in crypto
- Confirm the payment in your banking or wallet app
- Follow the status in your transaction history
- Take the payout back on the rail you deposited with
| Item | Detail |
|---|---|
| Currency | Pound sterling (GBP), £ only |
| Minimum deposit | £10 on every rail, £20 equivalent in crypto |
| Fastest payout | Open Banking over Faster Payments, minutes to 24 hours |
| Debit cards | Visa and Mastercard debit, payout in 1 to 3 working days |
| E-wallets | PayPal and Trustly, payout inside 24 hours |
| Crypto | BTC, ETH and USDT, settled in minutes to a few hours |
| Fees | No fee charged by OpenAI Casino on any listed method |
Licence, safety and control
Regulation, and the controls UK players expect
UK players expect a specific set of controls and every one of them is here: play is for adults aged 18 and over, deposit and loss limits can be set by day, week or month, session timers and reality checks interrupt a long session, and a cooling-off period locks the account on request. The UK Gambling Commission regulates the domestic market under the Gambling Act 2005. OpenAI Casino itself runs under an international Curaçao licensing framework, with the operating company answerable for everything published here. GamCare's National Gambling Helpline is free and open around the clock on 0808 8020 133, and BeGambleAware carries the same guidance in writing.
How your money and data are held
Every page and payment travels over TLS encryption, and card details are tokenised rather than stored in readable form. Player balances sit in accounts separate from operating funds, so your money is never working capital. Payment monitoring flags unusual patterns such as a rail change immediately before a large withdrawal, and the account holder is contacted before anything moves.
Staying in control
Deposit and loss limits can be set by day, week or month, and a lower limit applies immediately while a higher one takes 24 hours. Session timers, reality checks, a cooling-off period and self-exclusion all sit on one page in your account rather than three menus deep. The safer-play model watches session shape and spend velocity and surfaces those tools when a pattern shifts.
OpenAI Casino on mobile
There is no OpenAI Casino app to download, and there does not need to be. Safari and Chrome load the full lobby on a phone, including live tables from Evolution, the cashier and every welcome tier, and the OpenAI Casino login is the same one you use on a laptop.
Slots run in portrait, so a single thumb reaches the spin control and the balance at once. Adding the site to your home screen gives it an icon and a full-screen window without going through the App Store or Google Play, and the personalised lobby carries your history across from desktop the moment you sign in.
Support that answers at 3am
The on-site AI assistant answers in seconds at any hour and handles bonus terms, payment status and account settings directly. Anything it cannot settle goes to the email queue, which is answered in English within a few hours. There is no phone line, and that is stated here rather than buried in a footnote.
What stands out
- Ten published ladder tiers, £12,000 and 800 spins, with 35x on the bonus only.
- Open Banking payouts over Faster Payments in minutes to 24 hours.
- Published RTP printed next to every slot, and volatility next to that.
Worth knowing first
- Paysafecard is deposit only, so a second rail is needed to cash out.
- Live tables contribute 10% towards wagering against 100% on slots.
- Support is the AI assistant and email — there is no phone line.
Player feedback
What UK players say about OpenAI Casino
4.6
0 player reviews
Recurring themes: the ladder is readable, Open Banking is quick, and the front page settles down after a fortnight
Feedback below is from UK accounts, on payout speed, the welcome tiers and how well the personalised lobby reads their taste.
PR
Priya RamanBirmingham · 5 days ago
The ten-deposit ladder is the honest kind of welcome offer, and my third deposit still returned £900 in bonus on a 75% match. My one gripe is the spins: 20 a day for seven days means a busy week costs you a tranche, and I lost 40 on Gates of Olympus that way. Deposits by debit card cleared instantly and the £42 I took out landed the next morning. I would still tell a friend to start here.
CF
Callum FraserGlasgow · 12 days ago
My old site took three working days on every payout and never explained why. Open Banking here put £310 back in my Monzo account in about eleven minutes on a Tuesday night, which is the only comparison that matters to me. Big Bass Bonanza cleared most of the first wagering tier and the cashier showed the running total the whole way through.
SE
Sophie EllisBristol · 19 days ago
I set a £50 weekly deposit limit and a 30-minute session timer before I played a single spin, and both took under a minute to find. Starburst at 20p a spin is where I spend most of my time, and the reality check popping up mid-session is genuinely useful rather than annoying. PayPal withdrawals have come back within a day both times. The lobby did keep pushing high-volatility slots at me for the first fortnight, which was not my taste, though it reads me better now.
DW
Daniel WhitfieldLeeds · 27 days ago
I came for the OpenAI story and stayed because the front page stopped wasting my time. After about two weeks it was leading with Hacksaw titles, and Wanted Dead or a Wild is exactly the kind of thing I play. Trustly deposits at £10 and a payout back inside a day, no fuss. The assistant answered a wagering question at 2am with the actual figure rather than a link.
MB
Marcus BaileyManchester · 38 days ago
Ten deposits sounded like a gimmick until I worked out that every tier caps at £1,200 and the 35x only ever applies to the bonus. I have used four of them so far, funded by Apple Pay, and Crazy Time on the Evolution floor is where the last £200 of it went. The published RTP next to every slot is the detail that made me trust the place.