Gemini 3.5 Flash vs GLM-4.6
Benchmarks, API pricing and specs, head to head. Data updated 2026-06-10.
Google · May 2026
Google's I/O 2026 headliner: near-Pro intelligence at Flash speed, 78.8% on SWE-bench Verified with full multimodal input.
Z.ai (Zhipu) · Sep 2025
The budget coding-agent favorite of late 2025 — near-Sonnet coding utility with MIT weights and a $3/month plan.
The verdict
Gemini 3.5 Flash wins 1 of the 1 benchmarks these models share, against 0 for GLM-4.6. On price the gap is dramatic: GLM-4.6 works out roughly 3.4x cheaper per blended million tokens. Gemini 3.5 Flash also takes 1M of context versus 200K for GLM-4.6. And GLM-4.6 is open-weights (MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
Benchmark head-to-head 1–0
Specs & pricing
| Gemini 3.5 Flash | GLM-4.6 | |
|---|---|---|
| modhub Index | — | 63.9 |
| Input price / 1M | $1.5 | $0.6 |
| Output price / 1M | $9 | $2.2 |
| Context window | 1M | 200K |
| Max output | 66K | 128K |
| Open weights | no | yes (MIT) |
| Reasoning model | yes | yes |
| Multimodal input | text, image, audio, video | text |
| Knowledge cutoff | Feb 2026 | Jul 2025 |
| Released | May 2026 | Sep 2025 |
| Example monthly cost* | $28.50 | $9.30 |
* 10M input + 1.5M output tokens per month at list prices, no caching. Green = better value on that row.
Frequently asked questions
- Which is better, Gemini 3.5 Flash or GLM-4.6?
- Gemini 3.5 Flash wins 1 of the 1 benchmarks these models share, against 0 for GLM-4.6. On price the gap is dramatic: GLM-4.6 works out roughly 3.4x cheaper per blended million tokens. Gemini 3.5 Flash also takes 1M of context versus 200K for GLM-4.6. And GLM-4.6 is open-weights (MIT), so it can be self-hosted — a structural advantage if data control or vendor independence matters.
- Which is cheaper, Gemini 3.5 Flash or GLM-4.6?
- Gemini 3.5 Flash costs $1.5/$9 per million input/output tokens, while GLM-4.6 costs $0.6/$2.2. For a typical workload of 10M input and 1.5M output tokens per month, that's $28.50 versus $9.30.
- Which model is better for coding, Gemini 3.5 Flash or GLM-4.6?
- On SWE-bench Verified — the standard agentic-coding benchmark — Gemini 3.5 Flash scores 78.8% versus 68% for GLM-4.6, making Gemini 3.5 Flash the stronger pick for coding agents.