Specification

Family: Claude
Source:Claude Developer Platform docsT1observed 2 h agohigh
Release date: 27 May 2026
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Status: active
Source:Claude Developer Platform docsT1observed 2 h agohigh
Openness: proprietary
Source:Claude Developer Platform docsT1observed 2 h agohigh
Context window: 1M tokens
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Max output: 128K tokens
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Modalities: image, text
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Input modalities: image, text
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Output modalities: text
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Tokenizer: Claude
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Retirement date: 28 May 2027
Source:Claude Developer Platform docsT1observed 2 h agohigh
Retirement tentative: Yes
Source:Claude Developer Platform docsT1observed 2 h agohigh
File input: Yes
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Openrouter id: anthropic/claude-opus-4.8
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Supported parameters: include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, temperature, tool_choice, tools, verbosity
Source:OpenRouter public model & pricing listingT2observed 2 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

20

Source tiers

T1T25 / 15

Freshest observation

2 h ago

Conflicts

None

Modalities

Modalities: imagetext
Input: imagetext
Output: text

Capabilities

Tool calling
Yes
OpenRouter public model & pricing listing · T2
Structured output
Yes
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: 1M tokens
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Max output: 128K tokens
Source:OpenRouter public model & pricing listingT2observed 2 h agomedium
Tokenizer: Claude
Source:OpenRouter public model & pricing listingT2observed 2 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-4.8:batch	$2.5	$12.5	$0.25	—	1M	2 h ago	openrouter.aiT2
Anthropic API	$5	$25	$0.50	—	—	2 h ago	platform.claude.comT1
Anthropic APIanthropic/claude-opus-4.8	$5	$25	$0.50	—	1M	2 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

20 claims · 20 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
27 May 2026	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
active	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
1M 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
128K tokens	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

Retirement dateretirement_date1

Claim history for Retirement date
Value	Valid from → to	Status	Source	Confidence	Extractor
28 May 2027	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
Yes	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 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...	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-4.8	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
Yes	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_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, temperature, tool_choice, tools, verbosity	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 4.8Anthropic
Anthropic API lists Claude Opus 4.8 at $2.5 in / $12.5 out per 1M tokens
openrouter
openrouter.ai
11 Sept 2026
Listed by providerModelClaude Opus 4.8Anthropic
Anthropic API lists Claude Opus 4.8 at $5 in / $25 out per 1M tokens
openrouter
openrouter.ai
11 Sept 2026
New modelModelClaude Opus 4.8Anthropic
New model: Claude Opus 4.8 (Anthropic)
anthropic
platform.claude.com
11 Sept 2026
Listed by providerModelClaude Opus 4.8Anthropic
Anthropic API lists Claude Opus 4.8 at $5 in / $25 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	2 h ago	1
Claude Developer Platform docs	docs.claude.com/en/docs/about-claude/pricing.md	pricing	T1· Official	2 h ago	1
OpenRouter public model & pricing listing	openrouter.ai/api/v1/models	catalogue	T2· Quality secondary	2 h ago	1

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