AI Rankings

Anthropic

Claude Opus 5.5

Anthropic's current Opus model (September 2026), which Anthropic says performs at the level of Claude Fable 5.1 on most work at a lower price than Opus 5.

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Our editorial assessment, based on the public sources listed below. Last reviewed .

Overall rank
#1
Tier
S
Score
94.5
Main category
Overall

Strengths

  • Ranks near the top of the Artificial Analysis Intelligence Index, just ahead of Claude Sonnet 5.5
  • Per Anthropic, performs at Claude Fable 5.1's level on most work and costs 40% less than Opus 5 to run on typical workloads
  • 1M-token context and strong Terminal-Bench 4.0 results for agentic coding, per Anthropic

Considerations

  • At $4/$20 per 1M tokens it costs twice Sonnet 5.5, which trails it only narrowly on the Index
  • Released September 22, 2026; long-run independent evaluations are still accumulating

Price

$4 input / $20 output per 1M tokens (API); included in Claude Pro, Max, Team and Enterprise plans

Shown for reference — price is not part of the score.

Score breakdown

Performance
96.0
55% of score
Reputation
91.0
35% of score
Recency
98.0
10% of score

The overall score combines these sub-scores using the weights shown. How we score →

Verification status

Each field carries its own re-verification date. Amber means older than 90 days — treat those figures as stale until re-checked.

Pricing
Benchmark
Reputation
Feature list

Checked against the sources listed below.

Sources

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