Specification

Family: Claude
Source:Claude Developer Platform docsT1observed 1 h agohigh
Status: limited-availability
Source:Claude Developer Platform docsT1observed 1 h agohigh
Openness: proprietary
Source:Claude Developer Platform docsT1observed 1 h agohigh

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

4

Source tiers

T14

Freshest observation

1 h ago

Conflicts

None

Modalities

Modalities unavailable.

Capabilities

Tool calling
Unavailable
Structured output
Unavailable
Reasoning
Unavailable
Vision
Unavailable
Audio
Unavailable
Fine-tuning available
Unavailable

No capability flags have been observed from a source yet — we do not infer them.

No structured attributes yet.

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 API	$10	$50	$0.25	—	—	1 h ago	platform.claude.comT1

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 · Availability note

1 claims · 1 propertiesShow all properties

Availability noteavailability_note1

Claim history for Availability note
Value	Valid from → to	Status	Source	Confidence	Extractor
limited availability	11 Sept 2026 20:51 UTC → 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 →

11 Sept 2026
New modelModelClaude Mythos 5.1Anthropic
New model: Claude Mythos 5.1 (Anthropic)
anthropic
platform.claude.com
11 Sept 2026
Listed by providerModelClaude Mythos 5.1Anthropic
Anthropic API lists Claude Mythos 5.1 at $10 in / $50 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/pricing.md	pricing	T1· Official	53 min ago	1

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