Claude Opus 4.1
Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains...
Updated 33 min ago · first seen 11 Sept 2026
model_01M293VBDCP4QRYFQKXFFFAK76
- Context
- 200K tokens
- T2 · 34 min ago
- Released
- 5 Aug 2025
- T2 · 34 min ago
- Knowledge cutoff
- Jan 2025
- T2 · 34 min ago
Specification
- Family
- Claude
Source:Claude Developer Platform docsT1observed 52 min agohigh
- Release date
- 5 Aug 2025
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Status
- retired
Source:Claude Developer Platform docsT1observed 52 min agohigh
- Openness
- proprietary
Source:Claude Developer Platform docsT1observed 52 min agohigh
- Context window
- 200K tokens
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Max output
- 32K tokens
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Knowledge cutoff
- Jan 2025
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Modalities
- image, text
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Input modalities
- image, text
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Output modalities
- text
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Tokenizer
- Claude
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Deprecation date
- 5 Jun 2026
Source:Claude Developer Platform docsT1observed 52 min agohigh
- Retirement date
- 5 Aug 2026
Source:Claude Developer Platform docsT1observed 52 min agohigh
- Retirement tentative
- No
Source:Claude Developer Platform docsT1observed 52 min agohigh
- File input
- Yes
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Openrouter id
- anthropic/claude-opus-4.1
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Supported parameters
- include_reasoning, max_tokens, reasoning, stop, temperature, tool_choice, tools, top_k, top_p
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
Each value shows its source, tier and observation time. Conflicting claims are kept side by side and flagged — never averaged. How AI Atlas records facts →
Provenance
Attributed facts
23
Source tiers
T1T27 / 16
Freshest observation
34 min ago
Conflicts
None
Modalities
- Modalities
- imagetext
- Input
- imagetext
- Output
- text
Capabilities
Tool calling
Yes
OpenRouter public model & pricing listing · T2
Structured output
No
OpenRouter public model & pricing listing · T2
Reasoning
Yes
OpenRouter public model & pricing listing · T2
Vision
Yes
OpenRouter public model & pricing listing · T2
Audio
Unavailable
Fine-tuning available
Unavailable
- Context window
- 200K tokens
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Max output
- 32K tokens
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Knowledge cutoff
- Jan 2025
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
- Tokenizer
- Claude
Source:OpenRouter public model & pricing listingT2observed 34 min agomedium
No benchmark results recorded
Current prices
| Provider | Input / 1M | Output / 1M | Cached in | Batch in / out | Context | Observed | Source |
|---|---|---|---|---|---|---|---|
| Anthropic APIanthropic/claude-opus-4.1:batch | $7.5 | $37.5 | $0.75 | — | 200K | 33 min ago | openrouter.aiT2 |
| Anthropic API | $15 | $75 | $1.5 | — | — | 52 min ago | platform.claude.comT1 |
| Anthropic APIanthropic/claude-opus-4.1 | $15 | $75 | $1.5 | — | 200K | 33 min ago | openrouter.aiT2 |
USD per 1M tokens as published by each provider (USD). Rows are append-only: every change is kept in the history below.
Available through 1
Price history
Input price · USD / 1M tokens
Output price · USD / 1M tokens
- Anthropic API
No hardware estimate available
No lineage recorded
Papers 0
No papers linked yet.
Repositories 0
No repositories linked yet.
As of
Rewind the record: see this entity's attributes exactly as AI Atlas knew them on a given day.
Claim history · Retirement date
Retirement dateretirement_date1
| Value | Valid from → to | Status | Source | Confidence | Extractor |
|---|---|---|---|---|---|
| 5 Aug 2026 | → current | current | Claude Developer Platform docsT1 | high | deterministic |
Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →
Anthropic API lists Claude Opus 4.1 at $7.5 in / $37.5 out per 1M tokens
openrouterAnthropic API lists Claude Opus 4.1 at $15 in / $75 out per 1M tokens
openrouterAnthropic API lists Claude Opus 4.1 at $15 in / $75 out per 1M tokens
anthropic
| Source | Document | Type | Tier | Last observed | Snapshots |
|---|---|---|---|---|---|
| Claude Developer Platform docs | docs.claude.com/en/docs/about-claude/model-deprecations.md | model_docs | T1· Official | 44 min ago | 1 |
| Claude Developer Platform docs | docs.claude.com/en/docs/about-claude/pricing.md | pricing | T1· Official | 44 min ago | 1 |
| OpenRouter public model & pricing listing | openrouter.ai/api/v1/models | catalogue | T2· Quality secondary | 33 min ago | 1 |
Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.