Gemini 3.1 Pro vs GLM-5.2 — Price, Context, and Capability Compared
Verdict
Gemini 3.1 Pro costs 2.1× more per blended million tokens than GLM-5.2. Gemini 3.1 Pro has the larger context window (2,000,000 tokens). Default to GLM-5.2 unless you specifically need Gemini 3.1 Pro's edge.
Spec comparison
| Gemini 3.1 Pro | GLM-5.2 | |
|---|---|---|
| Price (input) | $2.00/M | $1.40/M ✓ |
| Price (output) | $12.00/M | $4.40/M ✓ |
| Blended price | $4.50/M | $2.15/M ✓ |
| Context window | 2,000,000 tokens ✓ | 1,000,000 tokens |
| Max output | 64,000 tokens | 64,000 tokens |
| Modalities | text, vision, audio | text |
| Reasoning mode | Yes | Yes |
| Released | 2026-02 | 2026-05 |
| Speed | 55 t/s | Not measured |
Cost at scale (3:1 blended)
| Tokens / month | Gemini 3.1 Pro | GLM-5.2 | Delta |
|---|---|---|---|
| 1,000,000 | $4.50 | $2.15 | $2.35 (2.1×) |
| 10,000,000 | $45.00 | $21.50 | $23.50 (2.1×) |
| 100,000,000 | $450.00 | $215.00 | $235.00 (2.1×) |
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 GLM-5.2 if…
- ✓Open-weights coding-first flagship
- ✓1M-token context window
- ✓Beats larger frontier models on long-horizon coding
- ✓Long-horizon coding on open weights at a fraction of frontier pricing.
Run this exact matchup right now
Send the same prompt to Gemini 3.1 Pro and GLM-5.2 side by side and see the outputs yourself.
Try Gemini 3.1 Pro vs GLM-5.2 FreeFAQ
Is Gemini 3.1 Pro cheaper than GLM-5.2?
GLM-5.2 is cheaper, at $2.15 per million blended tokens vs $4.50 for Gemini 3.1 Pro.
Which has the bigger context window, Gemini 3.1 Pro or GLM-5.2?
Gemini 3.1 Pro has the larger context window: 2,000,000 tokens vs 1,000,000.
Can Gemini 3.1 Pro replace GLM-5.2 for coding?
Both are viable for coding. Largest context window of any current model (2M tokens) (Gemini 3.1 Pro) vs Open-weights coding-first flagship (GLM-5.2) — pick based on which strength matters more for your workload.
Related
Gemini 3.1 Pro pricingGLM-5.2 pricingvs Claude Opus 4.8vs Grok 4.3vs GPT-5.6 Terravs Claude Sonnet 4.6Premium model tests
Pricing verified 2026-04-06. Specs verified 2026-08-08.
