Anthropic: Claude Sonnet 5 vs SpaceXAI: Grok 4.5
They cost about the same for input tokens: Anthropic: Claude Sonnet 5 $2.00 per M, SpaceXAI: Grok 4.5 $2.00 per M. SpaceXAI: Grok 4.5 is 1.7× cheaper for output tokens: Anthropic: Claude Sonnet 5 costs $10.00 per M and SpaceXAI: Grok 4.5 costs $6.00 per M. Anthropic: Claude Sonnet 5 reads more: Anthropic: Claude Sonnet 5 takes up to 1,000,000 tokens of context and SpaceXAI: Grok 4.5 up to 500,000.
| Anthropic: Claude Sonnet 5 | SpaceXAI: Grok 4.5 | |
|---|---|---|
| Model id | anthropic/claude-sonnet-5 | x-ai/grok-4.5 |
| Input | $2.00 per M | $2.00 per M |
| Output | $10.00 per M | $6.00 per M |
| Context length | 1,000,000 tokens | 500,000 tokens |
| Accepts | file, image, text | file, image, text |
| Produces | text | text |
| Served by | anthropic | xai |
Prices are the providers' list prices per million tokens, as of . Both run on your own provider key through one OpenAI-compatible endpoint, with no fee on the tokens.