Claude Mythos 5

Multimodal Proprietary

Context

Benchmarks

About Claude Mythos 5

Claude Mythos 5 is an AI model developed by Anthropic, in the multimodal category, released in 2026, made available as a proprietary (API-only) model. Claude Mythos 5 shares Claude Fable 5's full capabilities but lifts the safety classifiers in some areas, and is the suc.

On this page you'll find Claude Mythos 5's full specifications, including a context window of 1M tokens, 4 benchmark results. Review provider pricing and benchmark scores below, or compare Claude Mythos 5 head-to-head with other multimodal models.

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Claude Mythos 5 benchmark scores▶

Compare on the benchmark table →

Benchmark	Category	Score	Variant
OSWorld-Verified	agentic	85%	shared with Claude Fable 5 (same underlying model)
Terminal-Bench 2.1	agentic	84.3%	shared with Claude Fable 5 (same underlying model)
SWE-bench Pro	code	80%	shared with Claude Fable 5 (same underlying model)
SWE-bench Verified	code	95%	shared with Claude Fable 5 (same underlying model)

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Frequently asked questions

What is Claude Mythos 5? ▶

Claude Mythos 5 shares Claude Fable 5's full capabilities but lifts the safety classifiers in some areas, and is the suc It is tracked on GenAIList with its specifications, benchmark scores and provider pricing.

Who created Claude Mythos 5? ▶

Claude Mythos 5 was developed by Anthropic and released in 2026.

Is Claude Mythos 5 open source or proprietary? ▶

Claude Mythos 5 is a proprietary model. It is accessed through an API rather than by downloading the weights.

What is Claude Mythos 5's context window? ▶

Claude Mythos 5 supports a context window of 1M tokens.

How much does Claude Mythos 5 cost? ▶

Pricing for Claude Mythos 5 depends on the provider. See the providers table on this page for the latest API rates.

How does Claude Mythos 5 perform on benchmarks? ▶

Claude Mythos 5 is benchmarked across 4 evaluations on GenAIList, including OSWorld-Verified (85%). See the full benchmark table below and compare it with other models.