ActiveReleased Sep 1, 2026 Updated Sep 5, 2026

Claude Mythos 5.1

By Anthropic

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Benchmark composite—No verified claim

Context window1000000tokens

Input price$10.00per 1M tokens

Output price$50.00per 1M tokens

MODEL OVERVIEW

About Claude Mythos 5.1

Verified Claude API base pricing: $10 input / $50 output per 1M tokens. Anthropic states Mythos 5.1 shares Fable 5.1 specifications and pricing; access is invite-only through Project Glasswing.

Claude Mythos 5.1 is provided by Anthropic. AI Orbit records its release date as September 1, 2026. The current profile lists a 1000000 context window.

Cataloged capabilities include Text Generation, Reasoning, Image Understanding, Code Generation, API Access, and Agent Workflows. AI Orbit maps the model to use cases including General AI Assistance, Writing & Editing, Summarization, Brainstorming, and Question Answering.

AI Orbit currently lists $10.00 per 1M input tokens and $50.00 per 1M output tokens. Provider pricing can change, so production decisions should be checked against the linked official pricing source.

Related model coverage includes GPT-5, o3, GPT-5 mini, and Gemini 2.5 Pro. The profile also connects to current provider news when published intelligence is available.

ProviderAnthropic

ReleasedSep 1, 2026

Context window1000000

ProviderAnthropic

Version—

Release dateSeptember 1, 2026

StatusActive

Context window1000000

Associated product—

PROFILE EVIDENCE COVERAGE47/1004/7 checks verified

This score measures how much of the profile AI Orbit can support with stored evidence. It is not a rating of the model's quality, intelligence or performance.

IdentityExact version mapping still required

ProfileProfile verification is incomplete

Official evidenceOfficial-source evidence linked

CapabilitiesCapability taxonomy populated

Release dateOfficial release date stored

Context windowContext specification stored

Pricing modelCommercial terms are not fully pinned

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WHAT IT CAN DO

Capabilities & use cases

Text GenerationGenerates original text from natural-language instructions or structured prompts.ReasoningSupports multi-step reasoning, planning, analysis and problem solving.Image UnderstandingInterprets images, screenshots, diagrams and other visual inputs.Code GenerationGenerates source code, functions, components or complete implementations.API AccessProvides programmatic API access for application integration.Agent WorkflowsPlans and executes multi-step tasks with tools, state or autonomous actions.Function CallingInvokes defined functions or tools with structured arguments.

Useful for

General AI Assistance Writing & Editing Summarization Brainstorming Question Answering Code Completion App Prototyping Workflow Automation Task Automation

PERFORMANCE

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No verified benchmark claim yet

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API ECONOMICS

Pricing & availability

Commercial terms are shown in the unit that actually applies to this model instead of forcing every model into text-token pricing.

Source observed · verification pending

Pricing modelToken API

Billing unitNot classified

Evidence statusSource linked · review pending

Input tokensPer 1 million tokens$10.00

Output tokensPer 1 million tokens$50.00

Verified economics evidence Official source

SOURCE TRANSPARENCY

Verification evidence

Official source coverage

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Official provider source linked

The profile is connected to an official provider page. Structured evidence records are shown separately when available.

Open source

COMMON QUESTIONS

Claude Mythos 5.1 FAQ

Quick answers based on the verified information currently available in this model profile.

What is Claude Mythos 5.1?

Verified Claude API base pricing: $10 input / $50 output per 1M tokens. Anthropic states Mythos 5.1 shares Fable 5.1 specifications and pricing; access is invite-only through Project Glasswing. The current AI Orbit profile lists a 1000000 context window, released September 2026. Cataloged capabilities include Text Generation, Reasoning, Image Understanding...

Who created Claude Mythos 5.1?

Claude Mythos 5.1 is provided by Anthropic.

What can Claude Mythos 5.1 do?

Its listed capabilities include Text Generation, Reasoning, Image Understanding, Code Generation, API Access.

What is Claude Mythos 5.1 useful for?

AI Orbit currently maps Claude Mythos 5.1 to use cases including General AI Assistance, Writing & Editing, Summarization, Brainstorming and Question Answering.

What is the context window of Claude Mythos 5.1?

AI Orbit currently lists the context window as 1000000.

How much does Claude Mythos 5.1 cost?

AI Orbit currently lists $10.00 per 1M input tokens and $50.00 per 1M output tokens. Provider pricing can change, so check the linked official pricing source before production use.

GUIDES & ANALYSIS

Research related to Claude Mythos 5.1

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