AI Model Watch
Models / Anthropic

Claude Opus 4.1

Retired

RETIRED August 5, 2026 — Anthropic's deprecations table states Current state = Retired (read 2026-08-06); the endpoint no longer serves requests. Deprecated June 5, 2026. Recommended replacement claude-opus-4-8. API ID claude-opus-4-1-20250805 (alias claude-opus-4-1). Extended thinking: Yes; adaptive thinking: No. 200k context, max output 32k. Pricing $15 in / $75 out; 5m cache $18.75, 1h cache $30, cache hits $1.50/MTok. Batch $7.50/$37.50. Reliable knowledge cutoff Jan 2025; training data cutoff Mar 2025. Snapshot date 20250805 implies an Aug 5, 2025 release.

Claude Opus 4.1 by Anthropic costs $15 per 1M input tokens and $75 per 1M output tokens ($30/1M blended), with a 200K (200.000-token) context window. It has been retired (shut down 5 Aug 2026); the recommended migration is Claude Opus 4.8.

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

Lifecycle warning

This model has been retired. Scheduled shutdown: 5 Aug 2026. Recommended migration: Claude Opus 4.8.

Read the Claude Opus 4.1 migration guide → replacement & cheapest alternatives

Provider
Anthropic
Status
Retired
Input price
$15 / 1M tokens
Output price
$75 / 1M tokens
Cached input
$1.50 / 1M tokens
Blended price
$30 / 1M tokens
Context window
200.000 tokens (200K)
Max output
32.000 tokens
Modality
text, image, vision
Open weights
No — API only
Knowledge cutoff
2025-01
Released
—
API string
claude-opus-4-1-20250805

Source: Anthropic official documentation ↗

See also

Explore more

All Anthropic models→

Prices, context windows and lifecycle status for every Anthropic model we track.

Compare models head-to-head→

Side-by-side price, context and status for the models developers weigh against each other.

FAQ

Claude Opus 4.1 — questions & answers

How much does Claude Opus 4.1 cost?

Claude Opus 4.1 is priced at $15 per 1M input tokens and $75 per 1M output tokens ($30/1M blended at a 3:1 input-to-output ratio), with cached input at $1.50 per 1M tokens.

What is the context window of Claude Opus 4.1?

Claude Opus 4.1 has a 200.000-token context window (200K), with up to 32.000 output tokens per request.

Is Claude Opus 4.1 still available?

Claude Opus 4.1 has been retired and is no longer available. Its scheduled shutdown date is 5 Aug 2026. The recommended migration is Claude Opus 4.8.

Does Claude Opus 4.1 support image or vision input?

Yes — Claude Opus 4.1 accepts image input. Listed modalities: text, image, vision.

Can I self-host Claude Opus 4.1?

No — Claude Opus 4.1 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 4.1?

The API model identifier for Claude Opus 4.1 is "claude-opus-4-1-20250805" when calling Anthropic's API.

What is Claude Opus 4.1's knowledge cutoff?

Claude Opus 4.1's training knowledge cutoff is Jan 2025.