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news June 9, 2026<br>Claude Fable 5 and Mythos 5 Pricing: Anthropic's New $10/$50 Top Tier<br>Anthropic launched Claude Fable 5 and limited-preview Claude Mythos 5 at $10 input and $50 output per million tokens, with 1M context and 128K max output.<br>By AI Pricing Guru Editorial Team<br>AI Pricing Guru articles are maintained by the editorial workflow behind the site: daily pricing snapshots, provider source checks, and review passes for model launches, subscription limits, and billing changes.

Anthropic just launched Claude Fable 5 and Claude Mythos 5 , and this is not a normal Opus refresh.

Fable 5 is Anthropic’s most capable widely released model. Anthropic describes it as a Mythos-class model made safe for general use, with stronger performance than any Claude model it has previously made generally available. Mythos 5 is the same capability class with broader safeguards lifted for approved Project Glasswing customers.

The pricing is also a clean new top tier: $10.00 per million input tokens and $50.00 per million output tokens for both Fable 5 and Mythos 5.

For current live rates across the whole Claude lineup, see our Anthropic Claude API pricing page or model your own workload in the token cost calculator.

The Claude mobile app model selector is already showing Fable 5, with the label “Included until June 22.” That app inclusion signal is separate from API billing, but it confirms Anthropic is already putting Fable 5 in front of Claude users.

Claude Fable 5 API pricing

ItemClaude Fable 5 priceInput tokens$10.00 / 1MCache hits and refreshes$1.00 / 1M5-minute cache writes$12.50 / 1M1-hour cache writes$20.00 / 1MOutput tokens$50.00 / 1MContext window1M tokensMax output128K tokensAPI model IDclaude-fable-5<br>Fable 5 is generally available on the Claude API, Claude Platform on AWS, Amazon Bedrock, Vertex AI, and Microsoft Foundry beginning June 9, 2026.

Anthropic’s docs say adaptive thinking is always on for Fable 5. Raw thinking is not returned; developers can request summarized thinking, and the API supports effort controls, task budgets, memory tool use, context editing, compaction, and vision.

Claude Mythos 5 pricing and access

ItemClaude Mythos 5Input tokens$10.00 / 1MCache hits and refreshes$1.00 / 1M5-minute cache writes$12.50 / 1M1-hour cache writes$20.00 / 1MOutput tokens$50.00 / 1MContext window1M tokensMax output128K tokensAPI model IDclaude-mythos-5AvailabilityLimited Project Glasswing access<br>Mythos 5 is not generally available. Anthropic says it is offered to approved customers through Project Glasswing, with access through Anthropic, AWS, or Google Cloud account teams.

This is why Mythos is going to be a hot search term quickly: it is the restricted model line people have been waiting on, and Fable 5 is now the generally available path into that capability class.

Fable 5 vs Opus 4.8 pricing

Fable 5 is exactly 2x Opus 4.8 on standard API token pricing.

ModelInputCached inputOutputAvailabilityClaude Fable 5$10.00$1.00$50.00Generally availableClaude Mythos 5$10.00$1.00$50.00Limited previewClaude Opus 4.8$5.00$0.50$25.00Generally availableClaude Sonnet 4.6$3.00$0.30$15.00Generally availableClaude Haiku 4.5$1.00$0.10$5.00Generally available<br>That puts Fable 5 between regular Opus pricing and the restricted Mythos capability narrative. It is not cheap, but it is also not priced like an unreachable research-preview model. Anthropic says Fable 5 and Mythos 5 are less than half the price of Claude Mythos Preview.

Budget examples

WorkloadFable 5 / Mythos 5Opus 4.8100K input + 20K output$2.00$1.001M input + 200K output$20.00$10.0010M input + 2M output$200.00$100.00<br>The output side matters. A long agent run with large final deliverables can become expensive fast, especially if the workflow does not use prompt caching well.

What changed for developers

Fable 5 introduces a refusal and fallback behavior that developers need to handle.

Anthropic says Fable 5 includes safety classifiers. Some requests can be declined with stop_reason: “refusal” as a successful HTTP 200 response rather than an API error. Anthropic also supports fallback handling so refused requests can be retried on another Claude model, with fallback credit to avoid paying prompt-cache costs twice.

That means production routers should treat Fable 5 as a premium route with explicit fallback logic, not just a blind replacement for Opus 4.8.

Buyer advice

Use Fable 5 where the model’s extra capability can change the outcome: long-horizon coding agents, deep research, difficult document analysis, complex vision tasks, autonomous software work, and high-value workflows where a failed result costs more than the...