Claude Fable 5
Anthropic's June 9 2026 flagship and the first generally available model in the Mythos class: the new #1 overall. State-of-the-art on nearly every tested benchmark: SWE-bench Pro 80.3% (vs Opus 4.8 69.2%, GPT-5.5 58.6%), FrontierCode Diamond 29.3%, OSWorld-Verified computer use 85.0%, and a leading GDPval-AA knowledge-work Elo of 1932. Routes high-risk cyber/bio prompts to Opus 4.8 as a safety fallback. $10/$50 pricing (2x Opus 4.8) with a 90% prompt-caching discount; exact context window and max output were not officially disclosed at launch.
1M
tokens
64K
tokens
$10
per 1M tokens
$50
per 1M tokens
58
tokens/sec
Jun 2026
2026-06-09
$30.00
per 1M tokens
3.3
quality per $
Capabilities
Benchmarks
About Claude Fable 5
Claude Fable 5 is a flagship AI model by Anthropic, released on June 9, 2026. It supports a context window of 1000K tokens and can generate up to 64K output tokens.
At $10 per million input tokens and $50 per million output tokens, its blended cost of $30.00/1M tokens places it in the premium pricing tier. Its value score of 3.3 reflects the balance of quality and cost.
Using Claude Fable 5 with Swfte
Access Claude Fable 5 through Swfte Connect, our unified LLM gateway. Connect gives you a single API for 50+ models, with automatic routing, cost optimization, and fallback handling. You can also try Claude Fable 5 in our AI Playground before integrating.