Claude Opus 4.8

May 2026
Claude Opus 4.8
Compare in
on
—per task?
$5 / $25per 1M in / outcache $0.50
—output speed?
1Mcontext

Rankingat xhigh effort?

Alternatives?

History

9 versions
1234Jul 26Release dateLech Mazur Short-Story4.74.855.5
1234Jul 26Release dateLech Mazur Short-Story4.74.855.5

Benchmarks

all categories
Chat & Knowledge
HealthBench Professional length-adjustedlab56.9
Coding
DeepSWE 157.7#2
SWE-bench Pro (edition unstated)lab69.2
DeepSWE (edition unstated)lab58
Terminal-Bench 2.1lab82.7
Meta Internal Coding Benchlab69
SWE-rebench · all · March 1, 2026 to May 15, 202656.5#1
SWE-rebench · Go · March 1, 2026 to May 15, 20260#1
SWE-rebench · Java · March 1, 2026 to May 15, 20260#1
SWE-rebench · Rust · March 1, 2026 to May 15, 20260#1
SWE-rebench · Python · March 1, 2026 to May 15, 202656.5#1
SWE-rebench · TypeScript · March 1, 2026 to May 15, 20260#1
Agents & Tool Use
OSWorld-Verifiedlab83.4
Toolathlon-Verifiedlab76.2
MCP Atlaslab82.2
JobBenchlab48.4
Humanity’s Last Exam with toolslab57.9
Finance Agent v2lab53.9
DeepSearchQAlab84.3
Writing & Language
Vision & Documents
CharXiv Reasoninglab89.9
BabyVisionlab81.2

FAQ

How much does Claude Opus 4.8 cost?›

$5 per 1M input tokens and $25 per 1M output tokens; cached input $0.50 per 1M.

Is Claude Opus 4.8 free to use?›

There is no free API; the cheapest paid price is $5 per 1M input tokens.

How good is Claude Opus 4.8, and what is it best at?›

#14 of 336 in Chat & Knowledge, #30 of 134 in Coding, #43 of 135 in Agents & Tool Use, #21 of 197 in Writing & Language, #28 of 37 in Vision & Documents. Strongest at: Coding, Agents & work tasks, Tool calling, Reasoning, Science, Long context, Knowledge.

Is Claude Opus 4.8 better than Gemini 4 Argon?›

On Lech Mazur Short-Story, Claude Opus 4.8 scores 0.7 vs 0.7 — about the same.

How can I use Claude Opus 4.8?›

Through the API of Amazon Bedrock, Anthropic, Azure, Claude Platform on AWS, DeepInfra and 1 more.

What is the context window of Claude Opus 4.8?›

1M tokens, with up to 128K output tokens.

When was Claude Opus 4.8 released? Is there a newer version?›

Released 2026-05-28. It has been superseded by Claude Opus 5.

Is Claude Opus 4.8 open source?›

No, Claude Opus 4.8 is a closed model available through an API. The closest open-weights option here is GLM 5.3.

Can Claude Opus 4.8 read images?›

It accepts text and images, PDF files as input.

What is Claude Opus 4.8?›

Claude Opus 4.8 is a closed language model from Anthropic, released May 2026, the successor to Claude Opus 4.1.

What are the best alternatives to Claude Opus 4.8?›

Claude Opus 5.5 (cheaper), GPT-6 Astra (better), GLM 5.3 (open weights).