Closed SourceAnthropicReleased 2026-05
Claude Opus 4.8
Anthropic's most capable model, with improved instruction following and fewer refusals on edge cases
Context window
200K
Input / 1M tokens
$15.00
Output / 1M tokens
$75.00
Provider
Anthropic
Claude Opus 4.8 is a refined stepping revision of the Opus 4 generation. It keeps the 200K token context window and pricing of Opus 4.7 while delivering measurable improvements in instruction adherence, long-context coherence, and reduced refusal rates on legitimate but nuanced requests. Best used when task complexity justifies the cost premium over Sonnet.
Strengths
- ✓Best-in-class multi-step reasoning
- ✓Improved instruction following over Opus 4.7
- ✓Reduced refusals on edge-case and nuanced requests
- ✓Superior long-context comprehension at 200K tokens
- ✓Strong scientific and mathematical analysis
Best for developers who...
Complex research and analysis tasksHigh-stakes code generationLong-document analysisNuanced reasoning requiring careful judgment
Tools powered by Claude Opus 4.8
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