Google: Gemini 3.5 Flash vs SpaceXAI: Grok 4.20
SpaceXAI: Grok 4.20 is 1.2× cheaper for input tokens: Google: Gemini 3.5 Flash costs $1.50 per M and SpaceXAI: Grok 4.20 costs $1.25 per M. SpaceXAI: Grok 4.20 is 3.6× cheaper for output tokens: Google: Gemini 3.5 Flash costs $9.00 per M and SpaceXAI: Grok 4.20 costs $2.50 per M. SpaceXAI: Grok 4.20 reads more: Google: Gemini 3.5 Flash takes up to 1,048,576 tokens of context and SpaceXAI: Grok 4.20 up to 2,000,000. Google: Gemini 3.5 Flash accepts audio, file, image, text, video; SpaceXAI: Grok 4.20 accepts file, image, text.
| Google: Gemini 3.5 Flash | SpaceXAI: Grok 4.20 | |
|---|---|---|
| Model id | google/gemini-3.5-flash | x-ai/grok-4.20 |
| Input | $1.50 per M | $1.25 per M |
| Output | $9.00 per M | $2.50 per M |
| Context length | 1,048,576 tokens | 2,000,000 tokens |
| Accepts | audio, file, image, text, video | file, image, text |
| Produces | text | text |
| Served by | 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.