Claude Opus 5.5
PremiumAnthropic's new flagship for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5.
1M-token context with stronger multi-step changes across large codebases, more reliable code review and bug finding, and tool use sustained across extended tasks. Excels at end-to-end software engineering, visual analysis of charts and documents, complex office deliverables, and coordinating parallel subagents.
▼
Claude Opus 5.5 is very affordable at $4.00/M tokens input and $20.00/M tokens output. Cached input reads are priced at $0.20/M tokens, making repeated context cheaper. The model supports vision/image input, extended reasoning, a 1M context window.
Benchmarks
Category Rankings
Specifications
Performance
Providers
Misc
Compare with
GPT 6 Astravs Claude Opus 5.5GPT 6.1 Sol Provs Claude Opus 5.5GPT 6.1 Solvs Claude Opus 5.5GPT 6 Luna Provs Claude Opus 5.5GPT 6 Lunavs Claude Opus 5.5Claude Fable 5.1vs Claude Opus 5.5Claude Sonnet 5.5vs Claude Opus 5.5Claude Haiku 5.5vs Claude Opus 5.5
Gemini 3.8 Flashvs Claude Opus 5.5Gemini 3.5 Flash-Litevs Claude Opus 5.5Gemma 4 31Bvs Claude Opus 5.5
Grok 4.7vs Claude Opus 5.5Grok Build 0.1vs Claude Opus 5.5
Muse Spark 1.3vs Claude Opus 5.5
DeepSeek V4 Pro (0813)vs Claude Opus 5.5DeepSeek V4.1 Flashvs Claude Opus 5.5
MiniMax M3vs Claude Opus 5.5
Kimi K3vs Claude Opus 5.5Kimi K2.7 Codevs Claude Opus 5.5
GLM 5.3vs Claude Opus 5.5GLM 5.3 Flashvs Claude Opus 5.5
Qwen3.8 Max (0902)vs Claude Opus 5.5Qwen3 Coder Nextvs Claude Opus 5.5
Nemotron 3 Ultravs Claude Opus 5.5Frequently Asked Questions about Claude Opus 5.5▼
When was Claude Opus 5.5 released?
▼
Claude Opus 5.5 was released on September 22, 2026.
Who created Claude Opus 5.5?
▼
Claude Opus 5.5 was created by Anthropic.
How much does Claude Opus 5.5 cost?
▼
Claude Opus 5.5 costs $4.00/M input tokens and $20.00/M output tokens.
What is Claude Opus 5.5 API pricing?
▼
The Claude Opus 5.5 API is priced at $4.00 per million input tokens and $20.00 per million output tokens. You can access Claude Opus 5.5 through idapt.app alongside 200+ other AI models in one workspace.
Is Claude Opus 5.5 a reasoning model?
▼
Yes, Claude Opus 5.5 is a reasoning model. It can think step-by-step through complex problems before providing an answer, often yielding better results on difficult tasks like math, coding, and multi-step logic.
Does Claude Opus 5.5 support image or vision input?
▼
Yes, Claude Opus 5.5 supports vision/image input. You can share images in your conversation and the model will analyze and respond based on their content.
Does Claude Opus 5.5 support audio?
▼
No, Claude Opus 5.5 does not support audio input.
What is the context window of Claude Opus 5.5?
▼
Claude Opus 5.5 has a context window of 1M tokens, meaning it can process approximately 750,000 words of context at once.
Is Claude Opus 5.5 open source?
▼
Claude Opus 5.5 is a proprietary model developed by Anthropic. The model weights and training data are not publicly available.
What is Claude Opus 5.5 good at?
▼
Based on benchmark data, Claude Opus 5.5 excels at: mathematical problem solving, visual analysis and image understanding. It is Anthropic's capable model suitable for a wide range of tasks.
Where can I use Claude Opus 5.5?
▼
You can chat with Claude Opus 5.5 on idapt.app — no separate API key required. idapt is an AI workspace with 200+ models, agents, computers, and tasks. You can also access Claude Opus 5.5 through Anthropic's own API or platform.