WhichAI / Models / Claude Mythos 5

Claude Mythos 5

· verified July 26, 2026

private info-only reasoning enterprise

Provider

Statusprivate

AA Intelligence Index~61 (WhichAI estimate)

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

Claude Opus 5 (Anthropic) · AA 60.7Released July 24, 2026 · Claude Pro / Max plans · API $5/$25 per 1M tokens (Fast mode $10/$50)
Claude Fable 5 (Anthropic) · AA 59.9Claude Pro / Max plans (usage credits since July 7) · API $10/$50 per 1M tokens
GPT-5.6 Sol (OpenAI) · AA 58.9Released July 9, 2026 (rolling out) · API $5/$30 per 1M tokens · up to 750 tok/s on Cerebras

Open Claude's official app ↗ Open in the WhichAI app Not sure? Take the 30-second finder

Artificial Analysis Intelligence Index, 2026 rebased scale (top models ≈ 55–60). Snapshot: July 24, 2026 (BenchLM mirror), retrieved July 26, 2026. Context, price and release data come from vendor pages and public pricing mirrors (retrieved July 19, 2026). Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (Model guide and About > Methodology).