Gemini 3.1 Pro vs Gemini 3.6 Flash — Price, Context, and Capability Compared
Verdict
Gemini 3.1 Pro costs 1.3× more per blended million tokens than Gemini 3.6 Flash. Gemini 3.1 Pro has the larger context window (2,000,000 tokens). Default to Gemini 3.6 Flash unless you specifically need Gemini 3.1 Pro's edge.
Spec comparison
| Gemini 3.1 Pro | Gemini 3.6 Flash | |
|---|---|---|
| Price (input) | $2.00/M | $1.50/M ✓ |
| Price (output) | $12.00/M | $9.00/M ✓ |
| Blended price | $4.50/M | $3.38/M ✓ |
| Context window | 2,000,000 tokens ✓ | 1,000,000 tokens |
| Max output | 64,000 tokens | 64,000 tokens |
| Modalities | text, vision, audio | text, vision, audio |
| Reasoning mode | Yes | Yes |
| Released | 2026-02 | 2026-06 |
| Speed | 55 t/s | 114 t/s ✓ |
Cost at scale (3:1 blended)
| Tokens / month | Gemini 3.1 Pro | Gemini 3.6 Flash | Delta |
|---|---|---|---|
| 1,000,000 | $4.50 | $3.38 | $1.13 (1.3×) |
| 10,000,000 | $45.00 | $33.75 | $11.25 (1.3×) |
| 100,000,000 | $450.00 | $337.50 | $112.50 (1.3×) |
Choose Gemini 3.1 Pro if…
- ✓Largest context window of any current model (2M tokens)
- ✓Native audio and video understanding
- ✓Google Search grounding
- ✓Whole-codebase, whole-document, or long-video analysis in a single request.
Choose Gemini 3.6 Flash if…
- ✓Faster than Gemini 3.5 Flash
- ✓Top-tier coding and agentic performance for its price
- ✓1M-token context
- ✓Latency-sensitive coding and agentic tasks that still need a huge context window.
Run this exact matchup right now
Send the same prompt to Gemini 3.1 Pro and Gemini 3.6 Flash side by side and see the outputs yourself.
Try Gemini 3.1 Pro vs Gemini 3.6 Flash FreeFAQ
Is Gemini 3.1 Pro cheaper than Gemini 3.6 Flash?
Gemini 3.6 Flash is cheaper, at $3.38 per million blended tokens vs $4.50 for Gemini 3.1 Pro.
Which has the bigger context window, Gemini 3.1 Pro or Gemini 3.6 Flash?
Gemini 3.1 Pro has the larger context window: 2,000,000 tokens vs 1,000,000.
Can Gemini 3.1 Pro replace Gemini 3.6 Flash for coding?
Both are viable for coding. Largest context window of any current model (2M tokens) (Gemini 3.1 Pro) vs Faster than Gemini 3.5 Flash (Gemini 3.6 Flash) — pick based on which strength matters more for your workload.
Which is faster, Gemini 3.1 Pro or Gemini 3.6 Flash?
Gemini 3.6 Flash is faster: 114 t/s vs 55 t/s, measured on our speed benchmarks.
Related
Pricing verified 2026-04-06. Specs verified 2026-08-08.
