Nano Banana 2 (Gemini 3.1 Flash Image) vs GLM / Z.ai (Zhipu AI)
Which one should you pick? Here's the full breakdown.
Nano Banana 2 (Gemini 3.1 Flash Image)
Google's Gemini 3.1 Flash Image model -- the best-in-class text-in-image renderer, now the default across the Gemini app
GLM / Z.ai (Zhipu AI)
Zhipu AI's open-weights family -- GLM-4.6 text flagship and GLM-4.6V multimodal, true MIT licensed
| Category | Nano Banana 2 (Gemini 3.1 Flash Image) | GLM / Z.ai (Zhipu AI) |
|---|---|---|
| Ease of Use | 9.5 | 6.5 |
| Output Quality | 9.5 | 8.5 |
| Value | 8.5 | 9.0 |
| Features | 8.0 | 8.0 |
| Overall | 8.9 | 8.0 |
Pricing Comparison
| Feature | Nano Banana 2 (Gemini 3.1 Flash Image) | GLM / Z.ai (Zhipu AI) |
|---|---|---|
| Free Tier | Yes | Yes |
| Starting Price | $0 | $0 |
Benchmark Head-to-Head
GLM-4.6 benchmarks — Nano Banana 2 (Gemini 3.1 Flash Image) has no published benchmarks
| Benchmark | Description | Score |
|---|---|---|
| MMLU-Pro | Harder multi-subject reasoning | 81.2% |
| GPQA Diamond | Graduate-level science questions | 74.5% |
| HumanEval | Python code generation | 89.1% |
| SWE-Bench Verified | 64.2% | |
| BFCL (function calling) | 88% |
Which Should You Pick?
Pick Nano Banana 2 (Gemini 3.1 Flash Image) if...
- ✓Higher output quality (9.5 vs 8.5)
- ✓Easier to use (9.5 vs 6.5)
Designers, marketers, and content creators who need readable text in images (social posts, ad creative, book covers, infographics, event flyers) and who are already using or willing to pay for Gemini. If any part of your commercial design work requires typography to look right, Nano Banana 2 is the 2026 leader.
Visit Nano Banana 2 (Gemini 3.1 Flash Image)Pick GLM / Z.ai (Zhipu AI) if...
Teams that need genuine MIT-licensed frontier open weights with no commercial strings. Especially strong for agentic workflows and vision (GLM-4.6V).
Visit GLM / Z.ai (Zhipu AI)Our Verdict
Nano Banana 2 (Gemini 3.1 Flash Image) edges out GLM / Z.ai (Zhipu AI) with a 8.9 vs 8.0 overall score. Both are solid picks, but Nano Banana 2 (Gemini 3.1 Flash Image) has the advantage in output quality.