Gemini 3.6 Flash vs GLM-5.2 — Price, Context, and Capability Compared
Gemini 3.6 Flash vs GLM-5.2: which should I use?
Gemini 3.6 Flash costs 1.6× more per blended million tokens than GLM-5.2. Gemini 3.6 Flash has the larger context window (1,000,000 tokens). Default to GLM-5.2 unless you specifically need Gemini 3.6 Flash's edge.
Price, speed, and task evidence
Task verdict
Best-fit task signals from the published model strengths; this is not a substitute for a controlled benchmark.
| Fact | Gemini 3.6 Flash | GLM-5.2 |
|---|---|---|
| Best fit | Latency-sensitive coding and agentic tasks that still need a huge context window. | Long-horizon coding on open weights at a fraction of frontier pricing. |
| Reasoning mode | Available | Available |
Effective workload cost
Modeled for Coding Agent: 20,000 input + 2,000 output tokens per task, 1 turn. This is a workload model, not a provider quote.
| Fact | Gemini 3.6 Flash | GLM-5.2 |
|---|---|---|
| Coding Agent / task | $0.05 (modeled) | $0.04 (modeled) (winner) |
| Input / output rate | $1.50 / $9.00 per M | $1.40 / $4.40 per M |
Speed
Only non-estimated benchmark results are shown as measured.
| Fact | Gemini 3.6 Flash | GLM-5.2 |
|---|---|---|
| Measured throughput | 114 tokens/s | Unavailable |
| Time to first token | 310 ms | Unavailable |
API compatibility
Provider-level wire-format and SDK facts; model-specific parameter differences may still apply.
| Fact | Gemini 3.6 Flash | GLM-5.2 |
|---|---|---|
| OpenAI SDK | Not drop-in | Usable |
| Request shape | contents/parts structure instead of messages; an OpenAI-compatible endpoint exists but only covers a subset of parameters. | OpenAI-compatible chat/completions endpoint at api.z.ai/api/paas/v4. |
| Streaming | SSE (Gemini streamGenerateContent) | SSE (OpenAI delta) |
Privacy and retention
Provider policy and residency facts from the verified provider registry. A missing retention policy is not treated as a guarantee.
| Fact | Gemini 3.6 Flash | GLM-5.2 |
|---|---|---|
| Provider says API data trains models | No | Unavailable |
| Published retention period | Unavailable | Unavailable |
| Data residency | Global by default; Vertex AI offers selectable regional endpoints | Unavailable |
Migration effort
Direction is from each displayed model to the other. Effort is derived from provider compatibility and published parameter maps.
| Fact | Gemini 3.6 Flash | GLM-5.2 |
|---|---|---|
| Move Gemini 3.6 Flash → GLM-5.2 | config; 5 breaking parameter differences | Target: GLM-5.2 |
| Move GLM-5.2 → Gemini 3.6 Flash | Source: GLM-5.2 | code-change; 0 breaking parameter differences |
| Why | Keep the `openai` SDK; change `baseURL` and the API key. | contents/parts structure instead of messages; an OpenAI-compatible endpoint exists but only covers a subset of parameters. |
Spec comparison
| Gemini 3.6 Flash | GLM-5.2 | |
|---|---|---|
| Price (input) | $1.50/M | $1.40/M ✓ |
| Price (output) | $9.00/M | $4.40/M ✓ |
| Blended price | $3.38/M | $2.15/M ✓ |
| Context window | 1,000,000 tokens | 1,000,000 tokens |
| Max output | 64,000 tokens | 64,000 tokens |
| Modalities | text, vision, audio | text |
| Reasoning mode | Yes | Yes |
| Released | 2026-06 | 2026-05 |
| Speed | 114 t/s | Not measured |
Cost at scale (3:1 blended)
| Tokens / month | Gemini 3.6 Flash | GLM-5.2 | Delta |
|---|---|---|---|
| 1,000,000 | $3.38 | $2.15 | $1.23 (1.6×) |
| 10,000,000 | $33.75 | $21.50 | $12.25 (1.6×) |
| 100,000,000 | $337.50 | $215.00 | $122.50 (1.6×) |
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.
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 3.6 Flash and GLM-5.2 side by side and see the outputs yourself.
Try Gemini 3.6 Flash vs GLM-5.2 FreeFAQ
Is Gemini 3.6 Flash cheaper than GLM-5.2?
GLM-5.2 is cheaper, at $2.15 per million blended tokens vs $3.38 for Gemini 3.6 Flash.
Which has the bigger context window, Gemini 3.6 Flash or GLM-5.2?
Both models support 1,000,000 tokens of context.
Can Gemini 3.6 Flash replace GLM-5.2 for coding?
Both are viable for coding. Faster than Gemini 3.5 Flash (Gemini 3.6 Flash) vs Open-weights coding-first flagship (GLM-5.2) — pick based on which strength matters more for your workload.
Neither of these? See Gemini 3.6 Flash alternatives or GLM-5.2 alternatives.
Related
Pricing verified 2026-06-19. Specs verified 2026-08-08.