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Claude Opus 4.5 — 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.

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Claude Opus 4.5
anthropic/claude-opus-4.5
Provider
Anthropic
Family
Claude 4
Modality
text
Context window
200,000 tok
Max output
32,000 tok
Released
2026-05-22
License
Proprietary
Input price
$5.00 /1M
Output price
$25.00 /1M
Tools
yes
Streaming
yes
Vision
yes
JSON mode
yes
Reasoning
yes
Prompt caching
Batch API
Try it
Open in playground →
Claude Opus 4.5
anthropic/claude-opus-4.5
Full spec →

Claude Opus 4.5 brings further reasoning, coding, and agentic improvements over Opus 4.1, with stronger tool use and tighter instruction following.

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

Compare with another

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Claude Opus 4.5 vs Claude Opus 4.6
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Claude Opus 4.5 vs Claude Opus 4.7
anthropic/claude-opus-4.5 · anthropic/claude-opus-4.7
Claude Opus 4.8 vs Claude Opus 4.5
anthropic/claude-opus-4.8 · anthropic/claude-opus-4.5
Claude Opus 4.5 vs Claude Sonnet 4
anthropic/claude-opus-4.5 · anthropic/claude-sonnet-4
Claude Opus 4.5 vs Claude Sonnet 4.5
anthropic/claude-opus-4.5 · anthropic/claude-sonnet-4.5
Claude Sonnet 4.6 vs Claude Opus 4.5
anthropic/claude-sonnet-4.6 · anthropic/claude-opus-4.5