Claude Opus 4.1 review, price and benchmarks (2026)

legacy paid api

Provider

Statuslegacy

AA Intelligence Index33.7 (July 16, 2026 snapshot)

Releasedn/a

Context windown/a

Modalitiesn/a

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

Speedn/a

AccessAPI (legacy)

In one line

Mid-2025 generation - of historical interest and for compatibility with older pipelines.

Coding62

Reasoning60

Writing64

Agents & tools55

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

Alternatives worth a look

Qwen3.5 397B (Alibaba) · AA 33.7Open weights (Apache 2.0)
Kimi K2.5 (Moonshot AI) · AA 35.4Open weights · API hosts
Claude Sonnet 4.6 (Anthropic) · AA 35.9Claude Pro · API

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).