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Model catalogClaude Opus 4.8
CL

Claude Opus 4.8

Reasoning modelOpus

Claude Opus 4.8

Release date: 2026-05-28Updated: 2026-05-29 11:05:07.595Knowledge cutoff: 2026-01152
Live demoGitHubHugging FaceCompare
Parameters
Not disclosed
Context length
1M (1048576)
Chinese support
Supported
Reasoning ability

Claude Opus 4.8 is an AI model published by Anthropic, released on 2026-05-28, for Reasoning model, and 1M tokens context length, with no open-source license.

Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology

Claude Opus 4.8

Model basics

Reasoning traces
Supported
Thinking modes
Thinking Level · High (Default)Standard ModeThinking Level · LowThinking Level · MediumThinking Level · Extra-HighThinking Level · Max
Context length
1M (1048576) tokens
Max output length
125K (128000) tokens
Model type
Reasoning model
Release date
2026-05-28
Model file size
No data
MoE architecture
No
Total params / Active params
No data / N/A
Knowledge cutoff
2026-01
Claude Opus 4.8

Open source & experience

Code license
Not open source
Weights license
Not open source
GitHub repo
GitHub link unavailable
Hugging Face
Hugging Face link unavailable
Live demo
https://claude.ai/
Claude Opus 4.8

Official resources

Paper
Introducing Claude Opus 4.8
DataLearnerAI blog
DataLearnerAI blog
Claude Opus 4.8

API details

API speed
3/5
💡Default unit: $/1M tokens. If vendors use other units, follow their published pricing.
Learn about pricing modes
Standard
TypeConditionInputOutput
Text-$5.00/ 1M$25.00/ 1M
Cache PricingPrompt Cache
TypeTTLWriteRead
Text5m$6.25/ 1M$0.500/ 1M
Text1h$10.00/ 1M$0.500/ 1M
Claude Opus 4.8

Benchmark Results

Claude Opus 4.8 currently shows benchmark results led by SWE-bench Verified (2 / 106, score 88.60), HLE (4 / 156, score 57.90), GDPval-AA (1 / 21, score 1890). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.

Thinking
Tool usage

General Knowledge

2 evaluations
Benchmark / mode
Score
Rank/total
HLE
Extended
49.80
22 / 156
HLE
ExtendedTools
57.90
4 / 156

Coding and Software Engineer

2 evaluations
Benchmark / mode
Score
Rank/total
SWE-bench Verified
ExtendedTools
88.60
2 / 106
SWE-Bench Pro - Public
ExtendedTools
69.20
2 / 41

Productivity Knowledge

1 evaluations
Benchmark / mode
Score
Rank/total
GDPval-AA
ExtendedTools
1890
1 / 21

AI Agent - Tool Usage

1 evaluations
Benchmark / mode
Score
Rank/total
OSWorld-Verified
ExtendedTools
83.40
1 / 16
View benchmark analysisCompare with other models

Compare with other models

  • Peer modelClaude Opus 4.8 vs GPT-5.54 benchmarks
  • Earlier versionClaude Opus 4.8 vs Opus 4.74 benchmarks
  • Earlier versionClaude Opus 4.8 vs Claude Opus 4.64 benchmarks
  • Peer modelClaude Opus 4.8 vs Gemini 3.1 Pro Preview3 benchmarks

Want a custom combination? Open the compare tool

Claude Opus 4.8

Publisher

Anthropic
Anthropic
View publisher details
Claude Opus 4.8

Model Overview

Claude Opus 4.8 is an AI model published by Anthropic, released on 2026-05-28, for Reasoning model, and 1M tokens context length, with no open-source license.

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