Timeline — last reviewed July 27, 2026
Claude Fable 5 changelog
Fable 5 launched, was pulled offline by a government order, came back, left half the subscription tiers, and was undercut by a cheaper sibling — all inside seven weeks. Every entry below carries an explicit date and says what it means for someone building on the model.
Where things stand today
Fable 5 has been globally available since July 1, 2026 and its plan status has been settled since July 20: permanently included on Max and Team Premium at up to 50% of weekly limits, usage-credits-only on Pro and Team Standard. The bigger news is July 24, when Opus 5 arrived at $5/$25 — half Fable 5's price, ahead on Frontier-Bench, and with no data-retention requirement for general access. For a project starting today, Fable 5 is a deliberate choice rather than the default.
Claude Opus 5 arrives at half of Fable 5's price
Anthropic released Claude Opus 5 (claude-opus-5) at $5 per million input tokens and $25 per million output — the same price as Opus 4.8 — with a 1M-token context window. It scores 43.3% on Frontier-Bench v0.1 against Fable 5's 33.7% and Opus 4.8's 18.7%, and it became the default model on Claude Max and the most capable model available on Claude Pro. Crucially, general access to Opus 5 carries no data-retention requirement. What it means for you: if a compliance review blocked Fable 5 over the mandatory 30-day retention, that blocker does not exist here, and for most new work Opus 5 is now the sensible default.
The plan split takes effect
Fable 5 became a permanent part of Max and Team Premium plans, usable for up to 50% of each plan's weekly usage limit at no extra cost. Pro and Team Standard lost included access and moved to pay-as-you-go usage credits, softened by a one-time $100 credit. What it means for you: on Max there is nothing to do and nothing more to pay until you hit the 50% cap. On Pro, Fable 5 is now billed at $10/$50 per million tokens from the first token, so plan it as a line item in dollars rather than a plan feature.
Anthropic announces the permanent arrangement
After weeks of short extensions — the inclusion window had been pushed from July 7 to July 12 and then to July 19 — Anthropic announced on a Friday that Fable 5 would become a standard, permanent part of Max and Team Premium at 50% of limits, with Pro and Team Standard moving to credits. The company attributed the staged rollout to unpredictable demand and the time needed to bring inference capacity online. What it means for you: the recurring question of whether Fable 5 would still be in your plan next month is closed. You can now budget on it.
Claude Sonnet 5 launches with introductory pricing
Anthropic released Claude Sonnet 5 at an introductory $2 per million input tokens and $10 per million output, running through August 31, 2026, with a 1M-token context window. What it means for you: this is the model that removes most of the argument for putting Fable 5 on routine work. Keep the tokenizer change in mind when you compare — the same text counts roughly 30% more tokens than on older models, so the real saving is slightly smaller than the sticker prices suggest, though still large.
Fable 5 comes back online worldwide
Access was restored globally on the Claude Platform, Claude.ai, Claude Code and Claude Cowork after 19 days offline, with a new vulnerability-detection classifier in place. Pro, Max, Team and select Enterprise plans got Fable 5 included for up to 50% of weekly usage limits, initially only through July 7. Cloud marketplace availability came back separately. What it means for you: this is the date your integration could work again — and the reason any capacity planning that predates it is stale.
The export-control directive is rescinded
The US Commerce Department lifted the export controls on Fable 5 and Mythos 5 after Anthropic completed a national-security review. Mythos 5 access for a set of US organizations had already been approved on June 26. What it means for you: the restriction ended without a court ever ruling on whether it was lawful, which means the mechanism remains available. Treat single-model dependency as a live risk and keep a tested fallback path in your code rather than as a plan on paper.
The originally scheduled inclusion window ends
At launch, free Fable 5 access for Pro, Max, Team and Enterprise subscribers was scheduled to run out on this date. It arrived while both models were still suspended under the export-control directive, so the deadline passed without being the event anyone had planned for, and the access question stayed unresolved until the July 18 announcement. What it means for you: the dates Anthropic published for Fable 5 access were repeatedly overtaken by events between June and July — anything you read about plan inclusion from that period should be re-checked against the July 20 arrangement.
Fable 5 and Mythos 5 are pulled worldwide
A US Department of Commerce export-control directive, received that afternoon, barred access to both models by any foreign national whether inside or outside the United States. With no reliable way to verify nationality in real time, Anthropic disabled both models for every user globally within hours — three days after launch. What it means for you: a frontier model can disappear from production on a few hours' notice for reasons that have nothing to do with the vendor's uptime. Anything business-critical needs a second model wired in and tested.
Claude Fable 5 and Claude Mythos 5 launch
Anthropic released Fable 5 (claude-fable-5) as the first publicly available Mythos-class model, at $10 per million input tokens and $50 per million output, with a 1M-token context window and up to 128K output tokens. Mythos 5 — the same underlying model without the cybersecurity and biology restrictions — went only to vetted Project Glasswing partners. What it means for you: this is the release that introduced mandatory 30-day retention, always-on adaptive thinking, the effort parameter, and safeguard fallback to Opus 4.8. Integrations written for Opus 4.8 need changes, not just a new model ID.
How this timeline is sourced
Every entry traces back to a primary source: Anthropic's own announcement posts and support documentation for launches, pricing and plan changes; Anthropic's published benchmark tables for scores; and the company's June 30 redeployment post for the export-control sequence. Where a detail comes only from press reporting — the exact times of the June 12 directive, or the July 7 and July 12 extension dates — we say so in the entry rather than presenting it as official. Dates are written as explicit calendar dates in ISO form, never as "recently" or "last month", so a stale page is obvious at a glance. We re-check the whole timeline against Anthropic's documentation before each update and note the review date in the badge above.
Check the live picture before you commit
This page records what happened. If your question is whether Fable 5 is up right now, what it costs on your plan, or how it compares to Opus 5 today, the answer lives on those pages.