Overview
Analysis
Claude Fable 5.1 vs GPT-5.6 Sol vs Grok 4.6: side-by-side summary
Claude Fable 5.1, GPT-5.6 Sol, and Grok 4.6 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.
Claude Fable 5.1, from Anthropic, has a 1,000,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.
GPT-5.6 Sol, from OpenAI, has a 1,050,000-token context window and is priced at $4/M tokens input, $20/M tokens output on OpenRouter.
Grok 4.6, from SpaceXAI, has a 500,000-token context window and is priced at $2/M tokens input, $6/M tokens output on OpenRouter.
| Attribute | Claude Fable 5.1 | GPT-5.6 Sol | Grok 4.6 |
|---|---|---|---|
| Context window | 1,000,000 tokens | 1,050,000 tokens | 500,000 tokens |
| Price | $10/M tokens input, $50/M tokens output | $4/M tokens input, $20/M tokens output | $2/M tokens input, $6/M tokens output |
| Provided by | Anthropic | OpenAI | SpaceXAI |
| Model page | Claude Fable 5.1 model details, providers and pricing | GPT-5.6 Sol model details, providers and pricing | Grok 4.6 model details, providers and pricing |