AI Rate CardGemini 3.1 Pro Preview vs X-Ai/Grok-4-Fast-Reasoning: API price and specs
X-Ai/Grok-4-Fast-Reasoning is 82% cheaper than Gemini 3.1 Pro Preview on input price.
X-Ai/Grok-4-Fast-Reasoning is 92% cheaper than Gemini 3.1 Pro Preview on output price.
X-Ai/Grok-4-Fast-Reasoning is 88% cheaper than Gemini 3.1 Pro Preview on a 1M-in / 200k-out workload.
X-Ai/Grok-4-Fast-Reasoning has a 90.7% larger context than Gemini 3.1 Pro Preview.
| Field | Gemini 3.1 Pro Preview | X-Ai/Grok-4-Fast-Reasoning |
|---|---|---|
| Lowest input, per 1M | $1.00 +455.6% | $0.18 |
| Median input, per 1M | $2.00 +900% | $0.20 |
| Lowest output, per 1M | $6.00 +1233.3% | $0.45 |
| Median output, per 1M | $12.00 +2300% | $0.50 |
| Lowest unit price | — | — |
| Cost of 1M in + 200k out | $2.20 +714.8% | $0.27 |
| Context | 1M +47.6% | 2M |
| Max output | 66K +96.7% | 2M |
| Providers | 28 | 7 +75% |
| Regions | GLOBAL, US | US |
| Accepts | application/pdf, audio, audio/aac, audio/aiff, audio/alaw, audio/flac, audio/l16, audio/m4a, audio/mp3, audio/mpeg, audio/mulaw, audio/ogg, audio/opus, audio/wav, audio/webm, file, image, image/heic, image/heif, image/jpeg, image/png, image/webp, pdf, text, video, video/3gpp, video/avi, video/mov, video/mp4, video/mpeg, video/mpg, video/webm, video/wmv, video/x-flv | image, text |
| Returns | text | text |
| Type | Text models | Text models |
| Free option | no | no |
| Cheapest provider | kilo | jiekou |
Your own workload: how many tokens the model gets (input) and gives back (output) - for example, in a month. The "Cost" row of the table above is recalculated for these numbers, for each model.
Computed from current offers each time the page opens; the best value of a row is bold, the percent is how far behind the best.
Providers selling both
302ai, aihubmix, aiml, edenai, helicone, jiekou, poe
Frequently asked questions
Which is cheaper, Gemini 3.1 Pro Preview or X-Ai/Grok-4-Fast-Reasoning?
X-Ai/Grok-4-Fast-Reasoning is 82% cheaper than Gemini 3.1 Pro Preview on input price. X-Ai/Grok-4-Fast-Reasoning is 92% cheaper than Gemini 3.1 Pro Preview on output price. X-Ai/Grok-4-Fast-Reasoning is 88% cheaper than Gemini 3.1 Pro Preview on a 1M-in / 200k-out workload.
Which has the larger context, Gemini 3.1 Pro Preview or X-Ai/Grok-4-Fast-Reasoning?
Gemini 3.1 Pro Preview: 1M tokens; X-Ai/Grok-4-Fast-Reasoning: 2M tokens.
Where can I use both Gemini 3.1 Pro Preview and X-Ai/Grok-4-Fast-Reasoning?
302ai, aihubmix, aiml, edenai, helicone, jiekou, poe