WhichAI / Models / Claude Mythos 5

Claude Mythos 5

· verified October 14, 2026

private info-only reasoning enterprise

Provider

Statusprivate

AA Intelligence Indexnot measured yet

Releasedn/a

Context windown/a

Modalitiesn/a

API price $/1M (in / out)n/a

Speedn/a

AccessApproved organizations only (Project Glasswing); US government-cleared, expanding

The score shown is a WhichAI estimate from adjacent benchmarks, not an official measurement.

In one line

Same underlying model as Fable 5 with dual-use safeguards lifted for vetted organizations; deployed on critical infrastructure in 15+ countries.

Coding90

Reasoning94

Writing88

Agents & tools90

Category scores (0-100) are WhichAI blended ratings: public category leaderboards plus editorial judgment. Guidance, not official measurements.

Alternatives worth a look

Ministral 3 3B 2512 (Mistral AI) · AA 4.8API $0.1/$0.1 per 1M tokens on OpenRouter · open weights · listed December 2, 2025
Granite 4.0 Micro (IBM) · AA 5.1API $0.017/$0.112 per 1M tokens on OpenRouter · open weights · listed October 20, 2025
Ministral 3 8B 2512 (Mistral AI) · AA 5.5API $0.15/$0.15 per 1M tokens on OpenRouter · open weights · listed December 2, 2025

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Artificial Analysis Intelligence Index, official scale (the number published on artificialanalysis.ai), relayed by OpenRouter and refreshed automatically: last read October 14, 2026. 209 models carry a current official measurement. A value marked ~ is converted from an earlier snapshot because no current measurement is published; an unmeasured model is never ranked. Context, price, modality and listing dates come from the public OpenRouter model list (refreshed automatically on the live site; static copy retrieved October 3, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (the Ranking chapter and About > Methodology).