Claude Fable 5.2
Chat model · Anthropic ·
Claude Fable 5.2 is a chat model by Anthropic. In Endless it costs 1230.8 credits per 1M input tokens and 6153.8 per 1M output tokens, on the Hobby plan and up.
Claude Fable 5.2 is Anthropic's most capable widely released model, built for the hardest coding, research and long agent runs over a 1M-token context.
1230.8 / 6153.8 credits per 1M tokens
- Price
- 1230.8 credits per 1M input tokens
- 6153.8 credits per 1M output tokens
- Availability
- Available on Hobby and above
- Context window
- 1M tokens
- Max output
- 128K tokens
- Inputs
- Text, images
- Outputs
- Text
About Claude Fable 5.2
Claude Fable 5.2 is the top tier of the Claude lineup, released by Anthropic on November 9, 2026 as the successor to Claude Fable 5.1. It reads text and images, holds up to 1M tokens of context and writes up to 128K tokens in one reply. Thinking is always on, its knowledge runs through June 2026, and Anthropic says it writes its answers up to 30% faster than Fable 5.1.
Anthropic's own tests put it a step above Claude Opus 5.5 on most of what it measured. On FrontierSWE v2, a software engineering benchmark, it scores 69.9% against 62.3% for Opus 5.5 and 56.3% for Fable 5.1. It reaches 74.2% on Humanity's Last Exam with tools, 89.3% on the OSWorld 2.1 computer-use test and 73.4% on Chartography, a test of reading charts, up from 44.8% on Fable 5.1.
Reach for it when a task runs long and needs little supervision: tracking down a bug nobody has managed to explain, carrying a migration across a large codebase, or research that pulls together many sources and steps. It also handles data work such as SQL over real business tables and turning a 10-K into a forecast. Anthropic reports that its safeguards block about 55% fewer legitimate requests than Fable 5.1's.
Anthropic still recommends Claude Opus 5.5 as the everyday model: it handles most work well and costs less per turn. Move to Fable 5.2 when Opus 5.5 still falls short. In Endless both sit in the same chat, so you can switch between them inside one workspace, alongside models from OpenAI and Google.
Best for
- Multi-hour coding tasks and migrations that need a root-cause fix
- Research that pulls together many sources over many steps
- Data work such as SQL queries and financial models from 10-K filings
- Reading charts, screenshots and scanned documents
- Long agent runs with little supervision
- Problems where a faster model keeps falling short
Questions about Claude Fable 5.2
- What is Claude Fable 5.2?
- Claude Fable 5.2 is a chat model by Anthropic.
- Is Claude Fable 5.2 free?
- Claude Fable 5.2 needs the Hobby plan or higher, so the Free plan doesn't include it. The Free plan gives you 100 credits when you create a workspace and 50 credits every week to try other chat models.
- How much does Claude Fable 5.2 cost?
- In Endless it costs 1230.8 credits per 1M input tokens and 6153.8 per 1M output tokens, on the Hobby plan and up.
- How do I use Claude Fable 5.2?
- Start a chat in your Endless workspace and choose Claude Fable 5.2 in the model picker. Endless can also pick the best model for each message on its own.
- What are the alternatives to Claude Fable 5.2?
- Similar models you can use in Endless include Claude Opus 5.5, Claude Sonnet 5.5, and Claude Haiku 5.5. Each one has its own page with its price and plan.
- When was Claude Fable 5.2 released?
- Anthropic released Claude Fable 5.2 on November 9, 2026, together with Claude Mythos 5.2, the same model offered only to verified organizations.
- What is the difference between Claude Fable 5.2 and Claude Fable 5.1?
- Fable 5.2 replaces Fable 5.1 as Anthropic's most capable widely released model. Anthropic reports clear gains in coding, reasoning and vision (FrontierSWE v2 69.9% vs 56.3%, Chartography 73.4% vs 44.8%), answers up to 30% faster and about 55% fewer unnecessary safeguard blocks. The context window, reply length and June 2026 knowledge cutoff stay the same.
- Should I use Claude Fable 5.2 or Claude Opus 5.5?
- Start with Opus 5.5 for most work, since Anthropic recommends it as the everyday model and it costs less per turn. Choose Fable 5.2 for the hardest reasoning, large coding jobs and long agent runs where Opus 5.5 still falls short.
- Is Claude Fable 5.2 good for coding?
- Yes. It is Anthropic's strongest widely released coding model: 69.9% on FrontierSWE v2 and 49.1% on FrontierCode 2.0, ahead of Opus 5.5 on both. It suits long tasks that touch many files, such as migrations and hard-to-reproduce bugs.
- How much text can Claude Fable 5.2 read at once?
- It has a 1M-token context window, roughly 555,000 words. It can write up to 128K tokens in a single reply.
- How do I use Claude Fable 5.2 in Endless?
- Open a chat in Endless and pick Claude Fable 5.2 in the model picker. It is available on paid plans, and you can switch to another model at any point in the same conversation.
How to use Claude Fable 5.2 in Endless
- 01
Open a chat
Start a chat in your workspace and choose Claude Fable 5.2 in the model picker.
- 02
Bring your context
Attach files, mention a project with @, or ask it to search the web and social media.
- 03
Turn answers into work
Generate images and video, write documents and save what matters to a project.
Related models
Claude Opus 5.5
by Anthropic
Long agentic coding and research work over a 1M-token context
354.6 / 1773.1 credits per 1M tokens
Claude Sonnet 5.5
by Anthropic
Everyday coding and polished documents with a fast turnaround
266 / 1329.8 credits per 1M tokens
Claude Haiku 5.5
by Anthropic
Fast summaries, routing and subagent tasks at high volume
44.3 / 221.6 credits per 1M tokens
Start a chat with Claude Fable 5.2
Claude Fable 5.2 is on the Hobby plan and higher. Create a free workspace to try the other models first, then upgrade when you need it.