Anthropic
Anthropic Claude model for long-running agentic coding and knowledge work.
1M ctxUSD 4 / 1M input tok; USD 20 / 1M output tok
Introducing Claude Opus 4.8AnthropicReleased May 28, 2026
Claude Opus 4.8
The pinnacle of the Claude 4 generation, serving as the universal recommended replacement for legacy Claude 2 and Claude 3 Opus.
reasoning-llmProprietary API$5.00 / 1M tok (Default Thinking)Context: 1M (1,000,000 tokens)Arena ELO: 1515
Technical Specifications
Architecture Type
Frontier 1M Context Transformer
Total Parameters
Frontier Scale
Context Window
1M (1,000,000 tokens)
Max Output Tokens
128K (128,000 tokens)
Knowledge Cutoff
March 2026
Supported Modalities
text, code, vision, reasoning
License & Access
Anthropic Commercial Terms
Benchmark Evaluations
Mmlu Pro
90.1
Gpqa Diamond
84.6
Swe Bench Verified
83.4
Chatbot Arena ELO
1515
Deep Architectural Overview
Claude Opus 4.8 incorporates default test-time thinking, 1M context retention, and 128k output. Designated as the universal migration path for earlier Opus versions, it delivers exceptional stability across multi-day automated coding sessions.
Strengths & Considerations
Core Strengths
- Recommended migration destination for Claude 2.x and Claude 3 Opus
- 1M token context with 128k output buffer
- Active support through May 2027
Known Limitations
- Adaptive thinking default requires updated token budgeting for clients expecting instant responses
Token & API Pricing
Input Tokens (1M)$5.00
Output Tokens (1M)$25.00
Cached Input (1M)$0.5000
Batch API Discount50% Off Standard
Pricing is verified directly against Anthropic's developer documentation and API rate sheets.
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