Gemini 3.5 Flash vs Grok 4 20 Non Reasoning
API pricing, context window and capabilities for Gemini 3.5 Flash and Grok 4 20 Non Reasoning, 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 intelligence. Grok 4 20 Non Reasoning wins on price and on context window. Benchmark data is unavailable for one or both models.
Price
Grok 4 20 Non Reasoning
Coding
Not called
Intelligence
Gemini 3.5 Flash
Context window
Grok 4 20 Non Reasoning
Key takeaways
who wins on what, from the published numbersGemini 3.5 Flash wins
- More serving providers (5 vs 2)
- Has reasoning mode
- Supports audio
Grok 4 20 Non Reasoning wins
- Cheaper input ($1.50 vs $1.25 /1M)
- Cheaper output ($9.00 vs $2.50 /1M)
- Larger context window (1M vs 2M)
- Higher max output (66K vs 2M)
Cheaper overall
Grok 4 20 Non Reasoning
$1.25 + $2.50 /1M
Larger context
Grok 4 20 Non Reasoning
2M
More providers
Gemini 3.5 Flash
5 providers
Pricing & specs
cheapest serving route · per 1M tokens| Gemini 3.5 Flash | Grok 4 20 Non Reasoning | |
|---|---|---|
| Input $/1M | $1.50 | $1.25 best |
| Output $/1M | $9.00 | $2.50 best |
| Context window | 1M | 2M best |
| Max output | 66K | 2M best |
| Serving providers | 5 best | 2 |
| Released | 2026-05-22 | 2026-03-09 |
Benchmarks
Artificial Analysis indices, side by side| Gemini 3.5 Flash | Grok 4 20 Non Reasoning | |
|---|---|---|
| Intelligence | 52.0 best | 22.2 |
| Coding | 70.1 | Not available |
| GPQA Diamond | 92% best | 78% |
| Output speed | 206 t/s best | 88 t/s |
| Latency (TTFT) | 17.22s | 0.60s 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 20 Non Reasoning
via xAI
$8.75
Capabilities
feature support, side by side| Feature | Gemini 3.5 Flash | Grok 4 20 Non Reasoning |
|---|---|---|
| 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 20 Non Reasoning?
Grok 4 20 Non Reasoning is cheaper for input ($1.50 vs $1.25 per 1M tokens). Grok 4 20 Non Reasoning 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 20 Non Reasoning?
Gemini 3.5 Flash has a 1M-token context window and Grok 4 20 Non Reasoning has 2M tokens, so Grok 4 20 Non Reasoning can take a larger prompt.
How do Gemini 3.5 Flash and Grok 4 20 Non Reasoning compare on benchmarks?
On the tracked Artificial Analysis indices, Gemini 3.5 Flash leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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