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Claude Opus 5

Anthropic

Anthropic's newest base line — top-10 quality on a huge vote base.

Ranked #10 of 402 on LMArena’s overall board (style control) · retrieved 2026-09-19

The numbers

Arena Score (LMArena, style control)1492.9 (1488.7–1497.1, 42,617 votes)
Coding board score1533.3 (#12, 11,403 votes)
Intelligence Index (Artificial Analysis)50.7
Median output speed~51 tokens/sec
Price per 1M tokens in/out (LMArena)$5 / $25
Context window~1M
LicenseProprietary
Released2026-07-24

Exact source entries: LMArena “claude-opus-5-high” · Artificial Analysis “Claude Opus 5 (Adaptive Reasoning, Max Effort)”, retrieved 2026-09-19.

Try or learn more

Honest read

Best at

  • Arena Score 1493 across 42,617 votes — a trustworthy score
  • Intelligence Index 50.7, third-best we recorded
  • $5 / $25 per million tokens — half of Fable pricing

Not the pick for

  • Sits behind Anthropic's own Fable 5 and Opus 4.6/4.7 on the overall board
  • Measured output speed 51 tokens/second — the slowest of our top 10

Choose it if you are

Teams standardizing on Anthropic's newest generation who want the long-supported base model.

Rankings come from the sources above; this plain-language read is our editorial summary of those numbers.

Compare with the leaders

Best image Text-to-image, by blind human votes GPT-Image 2.5 (Sunburst) · Arena Score 1421 Best video Text-to-video, by blind human votes Gemini Omni 1.1 Flash · Arena Score 1515 Best code Coding, by blind human votes Claude Fable 5 · Arena Score 1552 Best reasoning Highest Intelligence Index we track Claude Fable 5.1 · Index 53.4 Best open model Open weights, by human votes Kimi K3 · Arena Score 1485 Best value Intelligence per dollar GLM 5.3 Flash · 176 pts / $1M