Claude 4 Opus

May 2025
Retired 2026-06-15Replace withClaude Opus 5.5Newer versionGPT-6 LunaBetterMiMo v2.6 ProOpen weights
Claude 4 Opus
Compare in
on
—per task?
not available via APIprice
—output speed?
200Kcontext

Rankingin thinking mode?

Retired models are left out of the current rankings.

Alternatives?

ModelScoreCostPer taskWhat changes
BetterGPT-5.6 Lunamedium+21%—$0.016OpenMiMo v2.6 Prothinking×2.2—$0.13Pass back reasoning_content+3BetterGPT-6 Lunamedium+45%—$0.017Function calling only with none · Chat Completions+3BetterClaude Haiku 5.5low+43%—$0.024Remove sampling parameters+5BetterMiMo v2.5 ProthinkingOpen+26%—$0.054No image input

History

9 versions
2030405060Jul 25Jan 26Jul 26Release dateAA Intelligence Index 4.3.244.14.54.64.74.855.5
2030405060Jul 25Jan 26Jul 26Release dateAA Intelligence Index 4.3.244.14.54.64.74.855.5

Benchmarks

all categories
Chat & Knowledge
Humanity's Last Exam12.3
AA Intelligence Index 4.3.2≈20.6
AA-LCR (long context) 1.169.3
MMLU-Pro · official boardlab87.3
GPQA Diamond79.6
AIME 2025 · AA archived73.3
Coding
Terminal-Bench Hard (version unstated)31.1
LiveCodeBench · AA archived63.6
LiveCodeBench · official artifact (through April 2025)70.4
Agents & Tool Use
τ²-bench · AA73.4
Writing & Language
IFBench (instructions)53.7

FAQ

How much does Claude 4 Opus cost?›

There is no per-unit API price: not available via API.

Is Claude 4 Opus free to use?›

There is no free API.

What is the context window of Claude 4 Opus?›

200K tokens.

When was Claude 4 Opus released? Is there a newer version?›

Released 2025-05-22. It has been superseded by Claude Opus 4.8.

Is Claude 4 Opus open source?›

No, Claude 4 Opus is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.

Can Claude 4 Opus read images?›

It accepts text and images, PDF files as input.

What is Claude 4 Opus?›

Claude 4 Opus is a closed language model from Anthropic, released May 2025.

What are the best alternatives to Claude 4 Opus?›

GPT-5.6 Luna (better), MiMo v2.6 Pro (open weights).