Specification

Family: Claude
Source:Claude Developer Platform docsT1observed 4 h agohigh
Release date: 5 Aug 2025
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Status: retired
Source:Claude Developer Platform docsT1observed 4 h agohigh
Openness: proprietary
Source:Claude Developer Platform docsT1observed 4 h agohigh
Context window: 200K tokens
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Max output: 32K tokens
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Knowledge cutoff: Jan 2025
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Modalities: image, text
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Input modalities: image, text
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Output modalities: text
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Tokenizer: Claude
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Deprecation date: 5 Jun 2026
Source:Claude Developer Platform docsT1observed 4 h agohigh
Retirement date: 5 Aug 2026
Source:Claude Developer Platform docsT1observed 4 h agohigh
Retirement tentative: No
Source:Claude Developer Platform docsT1observed 4 h agohigh
File input: Yes
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Openrouter id: anthropic/claude-opus-4.1
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Supported parameters: include_reasoning, max_tokens, reasoning, stop, temperature, tool_choice, tools, top_k, top_p
Source:OpenRouter public model & pricing listingT2observed 3 h 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

3 h 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 3 h agomedium
Max output: 32K tokens
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Knowledge cutoff: Jan 2025
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium
Tokenizer: Claude
Source:OpenRouter public model & pricing listingT2observed 3 h agomedium

No benchmark results recorded

Results appear when a tier 1–3 source publishes them; we never copy scores without a source.

Current prices

Current prices per 1M tokens
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	3 h ago	openrouter.aiT2
Anthropic API	$15	$75	$1.5	—	—	4 h ago	platform.claude.comT1
Anthropic APIanthropic/claude-opus-4.1	$15	$75	$1.5	—	200K	3 h 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

Anthropic API

Price history

Input price · USD / 1M tokens

Output price · USD / 1M tokens

Anthropic API

No hardware estimate available

Estimates need a parameter count; this model has none recorded from a source.

No lineage recorded

Lineage comes from explicit `derived_from`, `fine_tuned_from`, `distilled_from` and `quantized_from` relations stated by sources.

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

23 claims · 23 properties

Familyfamily1

Claim history for Family
Value	Valid from → to	Status	Source	Confidence	Extractor
Claude	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Release daterelease_date1

Claim history for Release date
Value	Valid from → to	Status	Source	Confidence	Extractor
5 Aug 2025	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Statusstatus1

Claim history for Status
Value	Valid from → to	Status	Source	Confidence	Extractor
retired	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Opennessopenness1

Claim history for Openness
Value	Valid from → to	Status	Source	Confidence	Extractor
proprietary	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Context windowcontext_length1

Claim history for Context window
Value	Valid from → to	Status	Source	Confidence	Extractor
200K tokens	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Max outputmax_output_tokens1

Claim history for Max output
Value	Valid from → to	Status	Source	Confidence	Extractor
32K tokens	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Knowledge cutoffknowledge_cutoff1

Claim history for Knowledge cutoff
Value	Valid from → to	Status	Source	Confidence	Extractor
Jan 2025	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Modalitiesmodalities1

Claim history for Modalities
Value	Valid from → to	Status	Source	Confidence	Extractor
image, text	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Input modalitiesmodalities_input1

Claim history for Input modalities
Value	Valid from → to	Status	Source	Confidence	Extractor
image, text	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Output modalitiesmodalities_output1

Claim history for Output modalities
Value	Valid from → to	Status	Source	Confidence	Extractor
text	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Tokenizertokenizer1

Claim history for Tokenizer
Value	Valid from → to	Status	Source	Confidence	Extractor
Claude	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Deprecation datedeprecation_date1

Claim history for Deprecation date
Value	Valid from → to	Status	Source	Confidence	Extractor
5 Jun 2026	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Retirement dateretirement_date1

Claim history for Retirement date
Value	Valid from → to	Status	Source	Confidence	Extractor
5 Aug 2026	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Retirement tentativeretirement_tentative1

Claim history for Retirement tentative
Value	Valid from → to	Status	Source	Confidence	Extractor
No	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Availability noteavailability_note1

Claim history for Availability note
Value	Valid from → to	Status	Source	Confidence	Extractor
retired, except on Bedrock and Google Cloud	11 Sept 2026 20:51 UTC → current	current	Claude Developer Platform docsT1	high	deterministic

Descriptiondescription1

Claim history for Description
Value	Valid from → to	Status	Source	Confidence	Extractor
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...	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

File inputfile_input1

Claim history for File input
Value	Valid from → to	Status	Source	Confidence	Extractor
Yes	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Openrouter idopenrouter_id1

Claim history for Openrouter id
Value	Valid from → to	Status	Source	Confidence	Extractor
anthropic/claude-opus-4.1	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Reasoningreasoning1

Claim history for Reasoning
Value	Valid from → to	Status	Source	Confidence	Extractor
Yes	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Structured outputstructured_output1

Claim history for Structured output
Value	Valid from → to	Status	Source	Confidence	Extractor
No	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Supported parameterssupported_parameters1

Claim history for Supported parameters
Value	Valid from → to	Status	Source	Confidence	Extractor
include_reasoning, max_tokens, reasoning, stop, temperature, tool_choice, tools, top_k, top_p	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Tool callingtool_calling1

Claim history for Tool calling
Value	Valid from → to	Status	Source	Confidence	Extractor
Yes	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	deterministic

Visionvision1

Claim history for Vision
Value	Valid from → to	Status	Source	Confidence	Extractor
Yes	11 Sept 2026 21:10 UTC → current	current	OpenRouter public model & pricing listingT2	medium	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 →

11 Sept 2026
Listed by providerModelClaude Opus 4.1Anthropic
Anthropic API lists Claude Opus 4.1 at $7.5 in / $37.5 out per 1M tokens
openrouter
openrouter.ai
11 Sept 2026
Listed by providerModelClaude Opus 4.1Anthropic
Anthropic API lists Claude Opus 4.1 at $15 in / $75 out per 1M tokens
openrouter
openrouter.ai
11 Sept 2026
New modelModelClaude Opus 4.1Anthropic
New model: Claude Opus 4.1 (Anthropic)
anthropic
platform.claude.com
11 Sept 2026
Listed by providerModelClaude Opus 4.1Anthropic
Anthropic API lists Claude Opus 4.1 at $15 in / $75 out per 1M tokens
anthropic
platform.claude.com

Full timeline →

Source documents
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	4 h ago	1
Claude Developer Platform docs	docs.claude.com/en/docs/about-claude/pricing.md	pricing	T1· Official	4 h ago	1
OpenRouter public model & pricing listing	openrouter.ai/api/v1/models	catalogue	T2· Quality secondary	3 h ago	1

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.