Last refreshed 2026-11-09. Next refresh: weekly.
Why use Claude Fable 5.2 on OpenRouter?
OpenRouter offers Claude Fable 5.2 with pay-as-you-go pricing at $8.00/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare Claude Fable 5.2 across 5 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: anthropic/claude-fable-5.2anthropic/claude-fable-5.2Request example
anthropic/claude-fable-5.2.Gotchas
- Use provider model ID "anthropic/claude-fable-5.2", not the LLMReference slug "claude-fable-5-2".
Compare Claude Fable 5.2 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $8.00 | $40.00 |
| AWS Bedrock | — | — |
| GCP Vertex AI | — | — |
| OpenRouter | $8.00 | $40.00 |
| Vercel AI Gateway | $8.00 | $40.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $8.00 |
| Output tokens | $40.00 |
Capabilities
About Claude Fable 5.2
Claude Fable 5.2 is Anthropic's generally available Mythos-class model for demanding reasoning and long-horizon agentic work, released November 9, 2026. It is the same underlying model as Claude Mythos 5.2 with cybersecurity and biology safeguards; requests those safeguards catch can fall back to other Claude models. Claude API id claude-fable-5-2. 1M-token context, 128K max output, adaptive thinking always on (default effort high), text and image input to text output. Knowledge cutoff June 2026. Anthropic documents model IDs for the Claude API, Amazon Bedrock, Claude Models on Google Cloud (Google-managed and Anthropic-managed), Microsoft Foundry and Claude Platform on AWS.