Gemini 3.5 Flash vs Grok 4.3
API pricing, context window and capabilities for Gemini 3.5 Flash and Grok 4.3, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersGemini 3.5 Flash wins on coding and on intelligence. Grok 4.3 wins on price.
Price
Grok 4.3
Coding
Gemini 3.5 Flash
Intelligence
Gemini 3.5 Flash
Context window
Tied
Key takeaways
who wins on what, from the published numbersGemini 3.5 Flash wins
- More serving providers (3 vs 1)
- Supports audio
Grok 4.3 wins
- Cheaper input ($1.50 vs $1.25 /1M)
- Cheaper output ($9.00 vs $2.50 /1M)
- Higher max output (66K vs 1M)
Cheaper overall
Grok 4.3
$1.25 + $2.50 /1M
Larger context
Tied
More providers
Gemini 3.5 Flash
3 providers
Pricing & specs
cheapest serving route · per 1M tokens| Gemini 3.5 Flash | Grok 4.3 | |
|---|---|---|
| Input $/1M | $1.50 | $1.25 best |
| Output $/1M | $9.00 | $2.50 best |
| Context window | 1M | 1M |
| Max output | 66K | 1M best |
| Serving providers | 3 best | 1 |
| Released | 2026-05-22 | 2026-04-18 |
Benchmarks
Artificial Analysis indices, side by side| Gemini 3.5 Flash | Grok 4.3 | |
|---|---|---|
| Intelligence | 50.2 best | 37.6 |
| Coding | 70.1 best | 42.3 |
| GPQA Diamond | 92% best | 90% |
| Output speed | 188 t/s best | 113 t/s |
| Latency (TTFT) | 18.79s | 17.26s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
Gemini 3.5 Flash
via Vertex AI
$17
Grok 4.3
via xAI
$8.75
Capabilities
feature support, side by side| Feature | Gemini 3.5 Flash | Grok 4.3 |
|---|---|---|
| Vision | ✓ | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | ✓ | — |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | ✓ | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, Gemini 3.5 Flash or Grok 4.3?
Grok 4.3 is cheaper for input ($1.50 vs $1.25 per 1M tokens). Grok 4.3 is cheaper for output ($9.00 vs $2.50 per 1M tokens).
What is the context window difference between Gemini 3.5 Flash and Grok 4.3?
Both Gemini 3.5 Flash and Grok 4.3 have about a 1M-token context window.
How do Gemini 3.5 Flash and Grok 4.3 compare on benchmarks?
On the tracked Artificial Analysis indices, Gemini 3.5 Flash leads on coding, and Gemini 3.5 Flash leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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