WhichAI / Models / Claude Fable 5

Claude Fable 5

· verified September 8, 2026

public paid api in Generator writing reasoning agents

Provider

Statuspublic

AA Intelligence Index62.1 (September 8, 2026 snapshot)

Releasedn/a

Context window1M

ModalitiesText + vision

API price $/1M (in / out)$10 / $50 · up to 128K output tokens

Speedn/a

AccessClaude Pro / Max plans (usage credits since July 7) · API $10/$50 per 1M tokens

In one line

Anthropic's newest flagship (Mythos-class) - tops the AA index at max effort and leads creative-writing boards for voice, subtext and character work; briefly export-controlled, now globally available.

Coding89

Reasoning92

Writing93

Agents & tools90

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

Alternatives worth a look

Muse Spark 1.3 (Meta) · AA 62.1Released September 2, 2026 · API $1.25/$4.25 per 1M tokens · Contributor tier $0.10/$0.20
GPT-6 Astra (OpenAI) · AA 61.2Released September 4, 2026 · API $10/$50 per 1M tokens ($1 cached) · ChatGPT Plus and Pro · batch tier at $5/$25
Claude Opus 5 (Anthropic) · AA 63Released July 24, 2026 · Claude Pro / Max plans · API $5/$25 per 1M tokens (Fast mode $10/$50)

Head-to-head: Claude Fable 5 vs Claude Opus 5 · Claude Fable 5 vs GPT-5.6 Sol · Claude Fable 5 vs Claude Opus 4.8

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Artificial Analysis Intelligence Index, 2026 rebased scale (top models ~ 55-66). Snapshot: September 4, 2026 (BenchLM mirror), retrieved September 8, 2026. Specs and prices come from the OpenRouter public model list on the same date. Models nobody has measured carry no index score at all and never enter a ranking: where an estimate exists it is shown separately and labelled unmeasured. Context, price, modality and release dates come from the public OpenRouter model list (retrieved September 8, 2026) and vendor pages. Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (Model guide and About > Methodology).