Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Gemini 2.5 Flash (Reasoning) | Grok 4.3 (medium) |
|---|---|---|
| Input ($/M tokens) | $0.3 | $1.25 |
| Output ($/M tokens) | $2.5 | $2.5 |
Data from Artificial Analysis API — 12 benchmarks
Gemini 2.5 Flash (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.85/M tokens vs $1.56/M for Grok 4.3 (medium).
Grok 4.3 (medium) wins 6 out of 12 benchmarks compared to 5 for Gemini 2.5 Flash (Reasoning). See the detailed benchmark chart above for per-category results.
Gemini 2.5 Flash (Reasoning) generates tokens faster at 231 tok/s vs 103 tok/s. Gemini 2.5 Flash (Reasoning) also has lower time-to-first-token (13.83s vs 21.73s).
Choose based on your priorities: Gemini 2.5 Flash (Reasoning) for lower cost, Grok 4.3 (medium) for stronger benchmark performance, and Gemini 2.5 Flash (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.