WhichAI / Models / Claude Opus 5

Claude Opus 5

· verified October 14, 2026

public paid api in Generator reasoning coding agents long-context

Provider

Statuspublic

AA Intelligence Index50.8 (official, read October 14, 2026)

Released2026-07-24

Context window1M

ModalitiesText + vision

API price $/1M (in / out)$5 / $25 · cache hits $0.50/M; Batch -50%; 128K output

Speedn/a

AccessReleased July 24, 2026 · Claude Pro / Max plans · API $5/$25 per 1M tokens (Fast mode $10/$50)

In one line

Anthropic's July flagship: 1M context, thinking on by default, computer use, and the Agentic Index lead, at unchanged Opus pricing. The default choice for long agentic runs where you want one model to hold the whole task.

Coding93

Reasoning94

Writing88

Agents & tools95

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

Alternatives worth a look

GPT-6.1 Sol (OpenAI) · AA 51.8API $2/$10 per 1M tokens on OpenRouter · listed September 29, 2026
Claude Fable 5 (Anthropic) · AA 49.6Claude Pro / Max plans (usage credits since July 7) · API $10/$50 per 1M tokens
Gemini 4 Argon (Google) · AA 52.6API $2/$10 per 1M tokens on OpenRouter · listed October 13, 2026

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

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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).