Fast-mode variant of [Opus 4.6](/anthropic/claude-opus-4.6) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Tested on 12 benchmarks with 43.4% average. Top scores: Chatbot Arena Elo — Coding (1546.2%), Chatbot Arena Elo — Overall (1502.8%), MASK (96.3%).
MiMo-V2-Flash scores 81.7 (98% as good) at $0.09/1M input · 100% cheaper
SEAL Pro Reasoning Finance. Tests financial analysis and reasoning with real-world data.
SEAL Pro Reasoning Legal. Tests legal reasoning and case analysis ability.
SEAL Visual Tool Bench. Tests ability to use visual tools for image analysis and manipulation.
SEAL SWE Atlas Test Writing. Tests ability to write effective test cases for existing code.
SEAL SWE Atlas Codebase Q&A. Tests understanding of large codebases through question answering.
SEAL Remote Labor Index. Evaluates AI performance on tasks typically done by remote knowledge workers.
Chatbot Arena coding Elo. Human preference ranking specifically for coding tasks and technical questions.
Chatbot Arena overall Elo rating. Crowdsourced human preference ranking from blind head-to-head comparisons across all topics.
vs GPT-5.4
vs DeepSeek-V2 (MoE-236B, May 2024)- Typemultimodal
- Context1.0M tokens (~500 books)
- ReleasedApr 2026
- LicenseProprietary
- StatusActive
- Cost / Message~$0.210
Anthropic$30.00