Gemini 3.8 Flash vs Grok 4.7
Gemini 3.8 Flash is about 2.0× cheaper than Grok 4.7 on blended token cost ($1.50 vs $3 per 1M). Gemini 3.8 Flash (Google) is $1.50/1M blended, 1.0M context. Grok 4.7 (xAI) is $3/1M blended, 500K context.
Last verified: 26 Sep 2026 · prices from official provider documentation
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| Spec | Gemini 3.8 Flash | Grok 4.7 |
|---|---|---|
| Provider | xAI | |
| Status | GA | GA |
| Input $/1M | $0.75 ◎ | $2 |
| Output $/1M | $3.75 ◎ | $6 |
| Blended $/1M | $1.50 ◎ | $3 |
| Context | 1.0M ◎ | 500K |
| Max output | 66K | — |
| Cutoff | — | 2026-05-01 |
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The last few changes we caught — this is what lands in your inbox:
- DeprecatingGoogle re-pointed the Gemini 2.5 TTS migration path past the 3.1 preview and onto the new GA 3.8 TTS models
- New modelGemini 3.8 Flash TTS is GA - a flagship text-to-speech model at under half the audio rate of the preview it replaces, on a two-column price schedule
- New modelGemini 3.8 Flash-Lite TTS is GA - Google's cost-efficient TTS, which Google says was built to replace Gemini 3.1 Flash TTS
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