Claude Opus 4.8
Parameters
Undisclosed
Context Length
1M
Modality
Multimodal
Architecture
Undisclosed
License
Proprietary
Release Date
28 May 2026
Knowledge Cutoff
-
API Pricing (per 1M)
Input: $5.00 · Output: $25.00
Evaluation Benchmarks
Rank
#27
| Benchmark | Score | Rank |
|---|---|---|
StackUnseen | 0.928 | 4 |
Graduate-Level QA | 0.936 | 5 |
Agent Arena | high 0.07 | 9 |
Coding | max 0.82 | 10 |
Mathematics | max 0.94 | 15 |
Reasoning | max 0.89 | 17 |
General Text | high 1481 Standard 1475 | 20 29 |
Coding Index | max 0.74 | 24 |
General | max 0.76 | 26 |
LiveBench Average | max 0.76 | 26 |
Web Development | high 1556 Standard 1534 | 34 42 |
Agentic Coding | max 0.51 | 35 |
Agentic Index | max 0.42 | 35 |
Intelligence Index | max 0.42 | 41 |
Data Analysis | max 0.66 | 48 |
Rankings
Overall Rank
#27
Coding Rank
#17
About Claude Opus 4.8
Anthropic's flagship model released May 28, 2026. Built on the Opus 4 architecture with significant improvements in coding agent performance and judgment quality. Opus 4.8 is approximately four times less likely to allow flaws in code it has written to pass unremarked compared to its predecessor. It introduces Dynamic Workflows in Claude Code, enabling hundreds of parallel subagents in a single session for codebase-scale migrations. Features a 1M token context window, adaptive thinking support, and is priced at $5/M input tokens and $25/M output tokens.
Technical Specifications
Architecture specifications are undisclosed for proprietary models.
Resources
About Claude Opus 4.8
The Claude Opus 4.8 generation represents Anthropic's most capable Opus-class model, built for complex reasoning, long-horizon agentic coding, and high-autonomy professional work. It introduces a major leap in judgment quality and multi-agent coordination, with the ability to run hundreds of parallel subagents simultaneously through the Dynamic Workflows feature in Claude Code.
Other Claude Opus 4.8 Models
- No related models available