Claude Opus 4.8

anthropic/claude-4.8-opus-20260528

Claude Opus 4.8, from Anthropic, accepts text, image, and file inputs and generates text output. It provides a context length of 1,000,000 tokens, costs $5 per million input tokens and $25 per million output tokens, and supports both tool usage and reasoning. The model is not open‑weight and was released on 2026‑05‑28.

  • tool use
  • structured outputs
  • reasoning

At a glance

provideranthropic
releasedMay 28, 2026
context1M
input / M$5

Specifications

What the API gives you

Context window
1M tokens
Max output
128K tokens
Input price
$5 / 1M tokens
Output price
$25 / 1M tokens
Cache read
$0.50 / 1M tokens
Modalities
text, image, file → text
Knowledge cutoff
—
Released
May 28, 2026

Recommendation coverage

Where this model appears

  1. #2Best LLM for Computer & Browser Use
  2. #2Best LLM for Agentic Coding
  3. #2Best LLM for Autonomous Agents
  4. #2Best LLM for AI Agents
  5. #2Best LLM for Tool & Function Calling
  6. #3Best LLM for Coding
  7. #5Best LLM for Frontend & UI
  8. #6Best LLM for Marketing Copy
  9. #6Best LLM for OCR & Documents
  10. #6Best LLM for Creative Writing
  11. #7Best LLM for JSON & Schema Output
  12. #7Best LLM for Writing
  13. #8Best LLM for Vision & Documents
  14. #8Best LLM for Document Parsing

Measured evidence

Public benchmark record

LMArena Agent
9.32026-07-13
LMArena Agent
102026-07-20
LMArena Text
1462 Elo2026-07-16
LMArena Text
1472 Elo2026-07-20
LMArena Vision
1295 Elo2026-07-12
LMArena WebDev
1562 Elo2026-07-16
LMArena WebDev
1564 Elo2026-07-20

LMArena data licensed CC-BY-4.0. Aider (Apache-2.0) and SWE-bench (MIT) are open.

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