AI Model Watch
Models / Anthropic

Claude Opus 4.5

GA

API ID claude-opus-4-5-20251101 (alias claude-opus-4-5). Listed under 'Legacy models' on overview but Active in deprecations table. Extended thinking: Yes; adaptive thinking: No. 200k context (not 1M). Max output 64k. 5m cache $6.25, 1h cache $10, cache hits $0.50/MTok. Batch $2.50/$12.50. Reliable knowledge cutoff May 2025; training data cutoff Aug 2025. Snapshot date 20251101 implies a Nov 2025 release. Tentative retirement not sooner than November 24, 2026.

Claude Opus 4.5 by Anthropic costs $5 per 1M input tokens and $25 per 1M output tokens ($10/1M blended), with a 200K (200.000-token) context window. It is generally available (GA), with a knowledge cutoff of May 2025.

Last verified: 13 Aug 2026 · sourced from official provider documentation

Provider
Anthropic
Status
GA
Input price
$5 / 1M tokens
Output price
$25 / 1M tokens
Cached input
$0.5 / 1M tokens
Blended price
$10 / 1M tokens
Context window
200.000 tokens (200K)
Max output
64.000 tokens
Modality
text, image, vision
Open weights
No — API only
Knowledge cutoff
2025-05
Released
—
API string
claude-opus-4-5-20251101

Source: Anthropic official documentation ↗

See also

Compare Claude Opus 4.5 head-to-head

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FAQ

Claude Opus 4.5 — questions & answers

How much does Claude Opus 4.5 cost?

Claude Opus 4.5 is priced at $5 per 1M input tokens and $25 per 1M output tokens ($10/1M blended at a 3:1 input-to-output ratio), with cached input at $0.5 per 1M tokens.

What is the context window of Claude Opus 4.5?

Claude Opus 4.5 has a 200.000-token context window (200K), with up to 64.000 output tokens per request.

Is Claude Opus 4.5 deprecated?

No — Claude Opus 4.5 is generally available (GA) and not currently scheduled for deprecation or retirement in our tracker.

Does Claude Opus 4.5 support image or vision input?

Yes — Claude Opus 4.5 accepts image input. Listed modalities: text, image, vision.

Can I self-host Claude Opus 4.5?

No — Claude Opus 4.5 is proprietary. Its weights are not publicly released, so it is available only through Anthropic's API (or hosted partners), not for self-hosting.

What is the API model string for Claude Opus 4.5?

The API model identifier for Claude Opus 4.5 is "claude-opus-4-5-20251101" when calling Anthropic's API.

What is Claude Opus 4.5's knowledge cutoff?

Claude Opus 4.5's training knowledge cutoff is May 2025.