Grok 4.3 vs Gemini 3.1 Pro
Side-by-side API pricing comparison · xAI vs Google
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Grok 4.3 is 273.3% cheaper on blended cost ($1.88 vs $7.00/Mtok)
Grok 4.3
by xAI
Current flagshipInput
$1.25/Mtok
Output
$2.50/Mtok
✓ Cheaper
| Blended avg | $1.88/Mtok |
|---|---|
| Context | 1M tokens |
| Modality | text, image |
| Parameters | Proprietary |
| Released | Apr 1, 2026 |
Gemini 3.1 Pro
by Google
Current flagshipInput
$2.00/Mtok
Output
$12.00/Mtok
| Blended avg | $7.00/Mtok |
|---|---|
| Context | 2M tokens |
| Modality | text, image, audio, video |
| Parameters | Proprietary |
| Released | Nov 1, 2025 |
Cost at scale — 1M tokens (50/50 input/output)
| Volume | Grok 4.3 | Gemini 3.1 Pro | Savings |
|---|---|---|---|
| 1M tokens | $1.88 | $7 | $5.13 (73.3%) |
| 10M tokens | $18.75 | $70 | $51.25 (73.2%) |
| 100M tokens | $187.5 | $700 | $512.5 (73.2%) |
| 1000M tokens | $1875 | $7000 | $5125 (73.2%) |
Summary
Grok 4.3 by xAI costs $1.25/Mtok input and $2.50/Mtok output, with a 1M-token context window. It supports text, image input.
Gemini 3.1 Pro by Google costs $2.00/Mtok input and $12.00/Mtok output, with a 2M-token context window. It supports text, image, audio, video input.
On a blended cost basis, Grok 4.3 is 273.3% cheaper than Gemini 3.1 Pro.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.