Compare

Claude Opus 5.5 — and what?

Pricing per million tokens, context window, capabilities — pulled from each provider's public docs. All 1 are available via the same AIgateway OpenAI-compatible endpoint; flip the model string to switch.

Search1/4
Claude Opus 5.5
anthropic/claude-opus-5.5
Provider
Anthropic
Family
Claude 4
Modality
text
Context window
1,000,000 tok
Max output
128,000 tok
Released
2026-09-23
License
Proprietary
Input price
$4.00 /1M
Output price
$20.00 /1M
Tools
yes
Streaming
yes
Vision
yes
JSON mode
yes
Reasoning
yes
Prompt caching
—
Batch API
—
Try it
Open in playground →
Claude Opus 5.5
anthropic/claude-opus-5.5
Full spec →

Claude Opus 5.5 is Anthropic's model for long-running agentic coding and knowledge work. It combines a one million token context window with adaptive thinking that is always on, a 128K token maximum output, and a medium default effort level.

Strengths
  • General-purpose chat
  • Long context
  • Tool use
Use cases
ChatbotsContent generationAgentic workflows

Compare with another

Claude Sonnet 5.5 vs Claude Opus 5.5
anthropic/claude-sonnet-5.5 · anthropic/claude-opus-5.5
GPT-6.1 Sol vs Claude Opus 5.5
openai/gpt-6.1-sol · anthropic/claude-opus-5.5
Claude Opus 5.5 vs Grok 4.7
anthropic/claude-opus-5.5 · xai/grok-4.7
Claude Opus 5.5 vs Glm-5.3
anthropic/claude-opus-5.5 · zai-org/glm-5.3
Claude Opus 5.5 vs Kimi K3
anthropic/claude-opus-5.5 · moonshot/kimi-k3
Claude Opus 5.5 vs Qwen3.8-Max
anthropic/claude-opus-5.5 · alibaba/qwen3.8-max
Claude Opus 5.5 vs GPT-5.6 Sol
anthropic/claude-opus-5.5 · openai/gpt-5.6-sol
Claude Opus 5.5 vs Qwen-Image-2.1-Pro
anthropic/claude-opus-5.5 · alibaba/qwen-image-2.1-pro
Claude Opus 5.5 vs Qwen3.8-27b
anthropic/claude-opus-5.5 · qwen/qwen3.8-27b