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Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
AuthorAnthropic
Country🇺🇸 United States
ReleasedSep 22, 2026
Overview
Cost rate
4x
Context
1M
Input
Output
Reasoning
Tool calling
Structured outputs
Pricing/M tokens
Input$4.00
Cached input$0.20
Output$20.00
Context
Context length1,000,000
Max output tokens128,000
Knowledge cutoff-
Performance
Throughput90 tok/s
Latency39.8s
DeepSeek V3.2 is DeepSeek's V3-generation model upgrade underlying both the deepseek-chat (non-thinking) and deepseek-reasoner (thinking) modes, improving efficiency and reasoning quality over V3.1. It is designed as a strong, low-cost general-purpose and reasoning model.
Mathematical#80Writing, Literature, & Language#95Life, Physical, & Social Science#97Entertainment, Sports, & Media#105
AuthorDeepSeek
Country🇨🇳 China
ReleasedDec 1, 2025
Overview
Cost rate
0.1x
Context
164K
Input
Output
Reasoning
Tool calling
Structured outputs
Pricing/M tokens
Input$0.27
Cached input$0.13
Output$0.40
Context
Context length163,840
Max output tokens65,536
Knowledge cutoff-
Performance
Throughput-
Latency-
Benchmarks
Head-to-head scores across reasoning, coding, and agentic indices, plus per-domain rankings.
Intelligence
57.6
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)
Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback)53.4Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)52.7
