GPAI Ledger › Model catalog (developer docs) (Anthropic) › Capture 29 Aug 2026

Model catalog (developer docs) — capture 20260829T113903Z

Verify: sha256sum e2ec785e7535156631a04d167ebfc7b8012dd076d745bbb3545a51183b3836ef.html.txt must equal the hash above (the filename IS the expected hash); ots verify e2ec785e7535156631a04d167ebfc7b8012dd076d745bbb3545a51183b3836ef.html.20260829T113903Z.ots -f e2ec785e7535156631a04d167ebfc7b8012dd076d745bbb3545a51183b3836ef.html.txt (opentimestamps.org) proves the bytes existed no later than the attestation time — an upper bound on the capture time; the fetch time above is the archive's own record (a freshly captured proof reports 'pending' here: the calendars anchor within hours, but this archive only upgrades the stored proof to its anchor on a later run, so expect a day or two). ots verify needs a local Bitcoin Core node (a pruned one is fine); without one, ots info on the proof prints the attesting block height and merkle path to check on any block explorer.

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Machine-extracted text (layout may be lost; the authoritative content is the stored file above).

Models overview - Claude Platform Docs
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Claude Fable 5
Claude Opus 5
Claude Sonnet 5
Claude Haiku 4.5
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Models & pricing
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Models
Models overview
Claude is a family of state-of-the-art large language models developed by Anthropic. Compare the current lineup, find the model ID for every platform, and open each model's page for its full specs and resources.
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Choosing a model
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Pricing
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Migration guide
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
Compare models

If you're unsure which model to use, start with
Claude Opus 5
 for complex agentic coding and enterprise work; for the highest available capability, use
Claude Fable 5
. All current models support text and image input, text output, multilingual capabilities, vision, and tool use; each model's page lists the platforms it is available on.

Feature
Claude Fable 5
Next-generation intelligence for long-running agents
Claude Opus 5
For complex agentic coding and enterprise work
Claude Sonnet 5
The best combination of speed and intelligence
Claude Haiku 4.5
The fastest model with near-frontier intelligence
Comparative latency
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Slower
Moderate
Fast
Fastest
Pricing
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$10 / input MTok
$50 / output MTok
$5 / input MTok
$25 / output MTok
$2 / input MTok
$10 / output MTok
$1 / input MTok
$5 / output MTok
Claude API ID

claude-fable-5
claude-opus-5
claude-sonnet-5
claude-haiku-4-5-20251001
Capabilities
Thinking
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Adaptive (always on)
Adaptive
Adaptive
Extended
Default effort
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high
high
high
Not supported
Context window
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1M tokens
1M tokens
1M tokens
200K tokens
Max output
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128K tokens
128K tokens
128K tokens
64K tokens
Reliable knowledge cutoff
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Jan 2026
May 2026
Jan 2026
Feb 2025
Show all details
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Once you've picked a model,
learn how to make your first API call
. For how model IDs, aliases, and snapshots work, see
Model IDs and versioning
; for the reliable-knowledge and training-data cutoffs behind each model, see
Anthropic's Transparency Hub
.


Using the Models API

You can query model capabilities and token limits programmatically with the
Models API
. The response includes
max_input_tokens
,
max_tokens
, and a
capabilities
 object for every available model.

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Prompt and output performance

Current Claude models excel in:

Performance:
 Top-tier results in reasoning, coding, multilingual tasks, long-context handling, honesty, and image processing. See
Prompting best practices
 for general and model-specific prompting guidance.

Engaging responses:
 Claude models are ideal for applications that require rich, human-like interactions. If you prefer more concise responses, adjust your prompts to guide the model toward the desired output length. Refer to the
prompt engineering guides
 for details.

Output quality:
 When migrating from a previous model generation, you may notice larger improvements in overall performance. If you're on Claude Opus 4.8 or earlier, see
Migrating to Claude Opus 5
.

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Get started with Claude

If you're ready to start exploring what Claude can do for you, dive in! Whether you're a developer looking to integrate Claude into your applications or a user wanting to experience the power of AI firsthand, the following resources can help.

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Intro to Claude
Explore Claude's capabilities and development flow.

Quickstart
Learn how to make your first API call in minutes.
Choosing a model
Establish criteria and pick the right model for your use case.
Pricing
Complete pricing, including batch discounts and prompt caching rates.
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Model deprecations
Lifecycle status and retirement commitments for every model.

Claude Console
Craft and test prompts directly in your browser.

Looking to chat with Claude? Visit
claude.ai
. If you have questions, reach out to the
support team
 or the
Discord community
.
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