Claude 6 Release Date: When Will Claude Opus 6 and Fable 6 Come Out?

Claude 6 is not out, and Anthropic has never announced it. Anthropic’s newest models are Claude Fable 5.2 and Claude Mythos 5.2, released on 9 November 2026. There is no Claude Opus 6, Fable 6, Sonnet 6 or Mythos 6 anywhere in its model docs. Betting markets put the first public Claude 6 model most likely in the first half of 2027. They give it only about a 6% chance of arriving before the end of 2026.

Claude Opus 6 is already a search term, and Anthropic’s IPO has added a new question: will Anthropic ship something big before or after it lists? This guide checks what Anthropic has released and what its IPO filing says. It then compares three betting markets and works out which Claude 6 model will most likely arrive first.

The Key Takeaways

• Not released: Anthropic’s model docs list Fable 5.2, Opus 5.5, Sonnet 5.5 and Haiku 5.5 as its latest models. No Claude 6 model, model ID or price exists.
• Most likely window: Anthropic has started a new generation roughly once a year, 14.6 months after Claude 3 and 12.6 months after Claude 4. The same rhythm points to spring or early summer 2027.
• Betting odds: on 11 November 2026, Polymarket priced a public Claude 6 at 34% by 31 March 2027 and 68% by 30 June 2027. Manifold, which also counts limited previews, gave 56% by 1 March.
• First to ship: Claude 5 began with Fable and Mythos, and Opus followed about six weeks later. If Claude 6 repeats that order, Claude Opus 6 will not be the first “6” you see.
• The IPO: Anthropic’s amended filing of 10 November sets a price range of $70 to $78 a share and says model releases are decided “on a case-by-case basis”. It names no Claude 6.

Is Claude 6 Out?

No. Claude 6 has not been released, previewed or named by Anthropic. Anthropic’s models overview, read on 11 November 2026, lists Claude Fable 5.2, Claude Opus 5.5, Claude Sonnet 5.5 and Claude Haiku 5.5 as its latest models. Claude Mythos 5.2 is listed for vetted organizations. None of them carries a 6.

The newest release is a point update, not a new generation. Claude Fable 5.2 and Claude Mythos 5.2 arrived on 9 November 2026. Anthropic’s announcement says they are up to 30% faster than the 5.1 models and cheaper, at $8 per million input tokens and $40 per million output tokens. Anthropic also posted the launch on its official Claude account:

Introducing Claude Fable 5.2 and Claude Mythos 5.2, designed to tackle the most daunting technical challenges.

They’re capable collaborators on ambitious projects in many fields, and show improvements in areas like coding, reasoning, and vision.

— Claude (@claudeai) November 9, 2026

The table shows Anthropic’s current lineup and where Claude 6 stands. Prices are Anthropic’s standard API rates per million tokens.

Two searches look like Claude 6 and are not. “claude-opus-4-6” is the model ID of Claude Opus 4.6, released in February 2026. “Claude 6 months free” is about subscription offers, not a model. Our Claude Fable 5.2 guide covers the newest release in full.

When Will Claude 6 Come Out?

Anthropic has given no date for Claude 6. The most likely window is the first half of 2027, based on Anthropic’s own release rhythm and on betting-market odds. Neither is a promise from Anthropic, so each input is shown separately.

Anthropic Starts a New Generation About Once a Year

Anthropic’s whole-number Claude generations have arrived about a year apart since 2024, and the gap is getting shorter. Claude 4 came 14.6 months after Claude 3. Claude 5 came 12.6 months after Claude 4.

A repeat of the last gap puts Claude 6 around late June 2027. If the gap shrinks again by about two months, as it did between Claude 4 and Claude 5, Claude 6 lands around April 2027. Claude 5 also had a preview. Anthropic gave Claude Mythos Preview to a small group of partners through Project Glasswing on 7 April 2026, two months before Fable 5 went public. A similar Claude 6 preview could come well before the public launch.

Point Releases Fill the Gap

Between generations, Anthropic ships point releases every few weeks, so a quiet stretch with no Claude 6 is normal. The Claude 4 generation had Opus 4.1, 4.5, 4.6, 4.7 and 4.8 before Claude 5 arrived. Claude 5 has had three rounds in five months. Fable 5.1 and Mythos 5.1 came in September. Opus 5.5, Sonnet 5.5 and Haiku 5.5 followed between 22 September and 7 October, and Fable 5.2 and Mythos 5.2 arrived on 9 November.

Anthropic’s IPO filing explains why. It says model versions released in the six months to 30 September 2026 “accounted for over 80% of our revenue” in the third quarter. New versions take over usage quickly, so Anthropic has a business reason to keep shipping 5.x updates rather than wait for a big jump. Expect at least one more Claude 5 release before any Claude 6.

Claude 6 Odds on Polymarket, Kalshi and Manifold

All three betting markets expect Claude 6 in 2027, most likely by mid-year. The table shows each market’s price on 11 November 2026. A price of 34% means traders pay 34 cents for a contract that pays $1 if Claude 6 ships by that date.

Polymarket is the largest of the three, with $49,765 traded on its “Claude 6 released by...?” market. Kalshi’s figures come from the CoinStats feed of its market, and Kalshi’s own page showed slightly lower later lines the same day, such as 66% for June and 88% for December 2027. Manifold runs on play money and had 23 traders, so its numbers move on very little.

Why the Three Markets Disagree

The markets disagree mainly because they count different things as Claude 6. Polymarket’s rules are the strictest. A model counts only if its name or model ID includes “Claude” and a version of 6 or higher, and only if the general public can use it. A Claude Fable 6, Opus 6, Sonnet 6 or Claude 7 would count. A Mythos 6 that only verified organizations can use would not, and neither would a closed beta.

Polymarket also excludes a trap that has already happened once: “Labeling errors, placeholder text, or version names displayed on the website” do not count unless the model is actually available. Manifold is the loosest. It counts any official Claude 6 release, including a developer beta or limited-partner preview. That is why Manifold gives 56% by 1 March while Polymarket gives only 34% by 31 March: a Mythos 6 preview would settle Manifold and leave Polymarket open.

What Moved the Odds in November

Claude 6 odds fell in the week Fable 5.2 launched. Kalshi’s 2026 line dropped 11.5 points after 4 November, to 7%, and Polymarket’s 31 March line dropped 7 points, to 34%. The drop lines up with the 9 November release. Traders read another Claude 5 update as a sign that Claude 6 is not weeks away.

Claude Opus 6, Fable 6 or Sonnet 6: Which Ships First?

Fable 6 and Mythos 6 are the most likely first Claude 6 models, with Claude Opus 6 a few weeks behind. That is the order Anthropic used for Claude 5, and the order follows from how the Mythos class works. Anthropic has not confirmed any Claude 6 name, so each model below is a projection from the Claude 5 rollout.

Claude Fable 6 and Claude Mythos 6

Claude Fable and Claude Mythos are the same underlying model with two sets of safeguards. Anthropic’s Fable 5.2 announcement says Fable has “strong cybersecurity and biology safeguards”, which let Anthropic offer it to everyone. Mythos goes to organizations in Anthropic’s Life Sciences and Cyber Verification Programs. Claude 5 opened with this pair on 9 June 2026, after the Mythos Preview in April.

If Claude 6 follows suit, the first sign will probably be a restricted Mythos 6 preview. The first public model would then be a Fable 6. Our guide to Claude Mythos explains how the class began and why Anthropic gated it.

Claude Opus 6

Claude Opus 6 is most likely to arrive several weeks after the first Claude 6 models. In the Claude 5 generation, Claude Opus 5 came out on 24 July 2026, about six weeks after Fable 5. Claude Opus is Anthropic’s workhorse model, and for most coding and knowledge tasks Anthropic still recommends starting with Claude Opus 5.5, released on 22 September.

No Claude Opus 6 price exists. The Opus line has been getting cheaper: Opus 5 cost $5 per million input tokens and $25 per million output tokens, and Opus 5.5 cut that to $4 and $20. Any Claude Opus 6 leak or pricing page you see today is a guess.

Traders expect another 5.x Opus before Claude Opus 6. On 11 November 2026, Kalshi’s “When will Anthropic release Opus 5.6?” market priced an Opus 5.6 at 50% before 1 December and 90% before 1 January 2027. An Opus 5.6 would not count as Claude 6 in any of the three markets.

Claude Sonnet 6 and Claude Haiku 6

Claude Sonnet 6 is likely to follow the first Claude 6 models closely, and Claude Haiku 6 may come much later. Claude Sonnet 5 arrived on 30 June 2026, three weeks after Fable 5, as the default model for the Free and Pro plans. There was no Haiku 5 at all: the next Haiku, Claude Haiku 5.5, arrived on 7 October. A Claude Haiku 6 could likewise wait for a later 6.x round.

Will Claude 6 Come Before the Anthropic IPO?

Very unlikely. Anthropic’s IPO filing now has a price range, and its newest release, Fable 5.2, came out the day before that filing. The betting markets give Claude 6 only a 6% to 7% chance this year. Anthropic filed Amendment No. 2 to its S-1 registration statement on 10 November 2026. It sets an expected price range of $70 to $78 per share for a Nasdaq listing under the ticker ANT. It also says Anthropic “released Mythos 5.2 and Fable 5.2 in November 2026”. It does not mention Claude 6.

The filing also shows Anthropic does not run on a fixed schedule: “We make decisions about model development and deployment, including whether to begin training a new model, on a case-by-case basis.” Depending on its safety assessments, Anthropic says it “may delay or suspend training or related research, delay releases, or limit access to models”.

The IPO has shaped release timing before. In September, Reuters reported, citing three sources, that Anthropic was considering a new model to answer OpenAI’s GPT-6 Astra ahead of its IPO. Opus 5.5 followed on 22 September. That pre-IPO model was a 5.5, not a 6, and Fable 5.2 is another 5.x. Our Anthropic IPO guide tracks the listing date and valuation.

Claude 6 Leaks and Rumors, Graded

No credible Claude 6 leak exists yet. No Claude 6 model ID has appeared in Anthropic’s docs or API, and Anthropic has not used the name. The claims that do circulate are below, with what the evidence supports.

The “Mythos 5.5” episode is the best lesson in how little a leaked name proves. Crypto Briefing reported on 1 November that a hidden reference on Anthropic’s website named Claude Mythos 5.5. ArtificialWatch reported that the name was gone from Anthropic’s Mythos page the same day. Eight days later, Anthropic shipped Mythos 5.2. A real “6” in a model ID would still be strong evidence, but a word on a web page is not.

What Will Claude 6 Be Like?

Anthropic has not described Claude 6, but the Fable 5.2 launch shows where Claude is heading. Anthropic says over 90% of the changes merged into its core codebase are now written by Claude. It also says a team of 1,000 Fable 5.2 agents formalized the proof of Fermat’s Last Theorem in 30 hours. Longer autonomous work on code and research is the clear direction.

The same announcement contains a detail that matters for Claude 6 timing. Anthropic says it “took steps to limit advances in the specific research capabilities that could most directly accelerate AI development” while training Fable 5.2. In areas like improving language model architectures, the model performs at about Opus 5.5 level. Anthropic is deliberately slowing how much Claude helps build the next Claude. That cuts against the idea that Claude 6 will arrive early because AI is now writing AI.

Expect the Fable and Mythos split to continue. Fable 5.2 still blocks high-risk cybersecurity and biology tasks and hands them to an older model: Opus 4.8 for cybersecurity and Opus 5 for biology. A more capable Claude 6 would raise the stakes of those checks, and the S-1 says safety reviews can delay a release or limit who gets a model.

What to Use While You Wait for Claude Opus 6

Claude Opus 5.5 is the model to use while you wait for Claude Opus 6. Anthropic’s own advice in the Fable 5.2 launch is to start with Opus 5.5 for most coding and knowledge work. Move up to Fable 5.2 for the hardest open-ended technical jobs, or down to Sonnet 5.5 or Haiku 5.5 for speed. Opus 5.5 costs half as much per token as Fable 5.2.

Fable 5.2 is worth the extra cost for long, difficult tasks. On Anthropic’s own benchmark table it beats Opus 5.5 on almost every row, and its FrontierSWE v2 score of 69.9% is ahead of GPT-6 Astra’s 65.5%. Our Claude Fable vs Opus comparison shows where each one wins. You also do not have to wait for one company’s next number to get a better answer. Fello AI lets you ask Claude, ChatGPT and Gemini the same question in one window. New models usually arrive in the app as soon as their API opens.

The Bottom Line

Claude 6 is a 2027 story, and the first model to carry the number is more likely to be Fable 6 or a restricted Mythos 6 than Claude Opus 6. Anthropic has just shipped Fable 5.2, its IPO filing names only 5.x models, and its own words say training and release decisions are made one model at a time. Treat any Claude 6 headline before the listing as noise. Watch for a Mythos 6 preview as the first real signal, and plan around spring to early summer 2027 for a public launch. OpenAI is on a similar clock: our GPT-7 release date guide places its next generation in the second half of 2027.

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