Claude Opus 4.5 review, price and benchmarks (2026)

legacy paid api coding

Provider

Statuslegacy

AA Intelligence Index40.8 (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

The late-2025 flagship that made agentic coding mainstream; now two generations back.

Coding72

Reasoning70

Writing70

Agents & tools68

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

Alternatives worth a look

Inkling (Thinking Machines Lab) · AA 40.7Open weights (Apache 2.0) on Hugging Face · Tinker API (256K ctx)
Hunyuan 3.0 (Hy3) (Tencent) · AA 41.2Open weights (Apache 2.0, released July 6, 2026) · 295B MoE, 21B active · 256K context
DeepSeek V4 Flash (DeepSeek) · AA 40.3Free chat app · open weights · cheapest DeepSeek API

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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).