Claude Opus 4.8

May 2026
Claude Opus 4.8
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$4.08per task?
$5 / $25per 1M in / outcache $0.50
60 tok/sfirst token in 43 s?
1Mcontext

Rankingat max effort?

Alternatives?

History

9 versions
304050Jan 26Apr 26Jul 26Release dateτ³-bench · Banking 1.0.14.54.64.74.85
304050Jan 26Apr 26Jul 26Release dateτ³-bench · Banking 1.0.14.54.64.74.85

Benchmarks

all categories
Chat & Knowledge
MLCR-AA19.4#26
HealthBench Professional length-adjustedlab56.9
Coding
DeepSWE 158.2#2
SciCode54.4#33
SWE-bench Pro (edition unstated)lab69.2
DeepSWE (edition unstated)lab58
Meta Internal Coding Benchlab69
Agents & Tool Use
Toolathlon-Verified76.2#3
EBR Bench28.6#14
OSWorld-Verifiedlab83.4
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. A typical benchmark task costs about $4.08 at max effort.

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 Claude Fable 5?›

On τ³-bench · banking · 1.0.1, Claude Opus 4.8 scores 39.7 vs 39.7 — about the same. It is 53% cheaper per task.

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 It has been superseded by Claude Opus 5.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 Kimi K3.

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?›

Grok 4.5 (cheaper), Kimi K3 (open weights).