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Anthropic: Claude Opus 5

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anthropic/claude-opus-5

Claude Opus 5 is Anthropic’s proprietary AI model, released Jul 24, 2026. It costs $5/M input and $25/M output tokens, and handles a 1M-token context window. Its strongest use case is coding, where it ranks in the 94th percentile of the models Model Beat tracks.

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work.

Context
1M
Input
$5 / 1M
Output
$25 / 1M
Released
Jul 24, 2026
Modalities
textimagefile→text
Strongest atCoding top 6%Reasoning & Knowledge top 8%Agentic & Tools top 9%

Benchmarks

Scores on standardized evaluations. Higher is better — and rank shows where Claude Opus 5 lands among all models tracked on Model Beat.

92.0
Intelligence Index
Epoch AI
92nd percentile of tracked models
94.0
Coding Index
Epoch AI
94th percentile of tracked models
91.0
Agentic Index
Epoch AI
91st percentile of tracked models

Reasoning

7 evals
ARC-AGI97.5%

Abstract visual reasoning

ARC-AGI-290.4%

Harder abstract reasoning

GPQA Diamond93.9%

Graduate-level scientific reasoning

Humanity's Last Exam54.9%

Frontier of human expert knowledge

SimpleBench80.6%

Common-sense trick questions

SimpleQA Verified59.9%

Factual accuracy & hallucination

WeirdML91.8%

Novel ML problem-solving

Coding

2 evals
SciCode56.4%

Scientific research coding

WebDev Arena1691

Human-rated web development

Math

1 evals
AIME 2024/202598.9%

Olympiad-qualifier math

Agentic & Tools

1 evals
APEX43.5%

Multi-step agentic tasks

In the news

18

Changelog

2
  • Claude Opus 5: reported SimpleQA Verified score rose from 56.7% to 59.9% (+6%)benchmark · Aug 28, 2026
  • Claude Opus 5 added to the tracker: $5/$25 per 1M, 1M context.tracked · Jul 24, 2026

Compare Claude Opus 5 with

Claude Opus 5 vs GPT-6 AstraClaude Opus 5 vs Claude Fable 5Claude Opus 5 vs Kimi K3Claude Opus 5 vs Grok 4.6Claude Opus 5 vs DeepSeek-V4-Pro-0813

Frequently asked questions

What is Claude Opus 5?

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work.

Who created Claude Opus 5?

Claude Opus 5 is an AI model developed by Anthropic, part of the Claude family, released Jul 24, 2026.

How much does Claude Opus 5 cost?

Claude Opus 5's list price from Anthropic is $5 per million input tokens and $25 per million output tokens.

What is Claude Opus 5's context window?

Claude Opus 5 supports a context window of up to 1M tokens.

How does Claude Opus 5 perform on benchmarks?

On standardized evaluations tracked by Epoch AI, Claude Opus 5 scores 54.9% on Humanity's Last Exam, 80.6% on SimpleBench, 1691 on WebDev Arena.

Is Claude Opus 5 open source?

Claude Opus 5 is a proprietary model (API access), available through its provider's API rather than as a downloadable open-weight model.

Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Sep 10, 2026.