Gemini 3 Flash Preview vs GLM-5.3
Side-by-side comparison of API pricing, specs, benchmarks, and capabilities
| Specification |
by Google
|
by Z.AI
|
|---|---|---|
| Overview | ||
| Status | Preview flagship | Current flagship |
| Released | Dec 17, 2025 | Aug 14, 2026 |
| Pricing per million tokens | ||
| Input | $0.500/Mtok | $1.40/Mtok |
| Output | $3.00/Mtok | $4.40/Mtok |
| Blended avg | $1.13/Mtok | $2.15/Mtok |
| Cached input | $0.050/Mtok | $0.260/Mtok |
| Specifications | ||
| Context window | 1M tokens | 1M tokens |
| Parameters | Proprietary | Proprietary |
| Speed (TPS) | — | — |
| Modalities | ||
| Input |
textimageaudiovideo
|
text
|
| Benchmarks sources: Artificial Analysis, Google model card, Google model card (no tools) / Artificial Analysis | ||
| Independent composite scores measured for both models — each on its own scale | ||
| AA Intelligence Index | 27 | 59.5 |
| AA Agentic Index | — | 59.1 |
| AA-Omniscience Index (−100–100) | — | 14.3 |
| GDPval-AA v2 | — | 1769 ELO |
| LMSYS Chatbot Arena | 1472.9 ELO | — |
| Per-benchmark results published for Gemini 3 Flash Preview only — no independent per-benchmark scores exist for GLM-5.3 yet | ||
| GPQA Diamond | 90.4 vendor | — |
| SWE-Bench Verified | 78 vendor | — |
| Humanity's Last Exam | 33.7 vendor | — |
| Providers | ||
| Available from |
Google — $0.500/$3.00/Mtok
|
Z.AI — $1.40/$4.40/Mtok
|
Cost at scale
1M tokens · 50/50 input/output| Volume | Gemini 3 Flash Preview | GLM-5.3 | Savings |
|---|---|---|---|
| 1M tokens | $1.13 | $2.15 | $1.02 (47.4%) |
| 10M tokens | $11.25 | $21.5 | $10.25 (47.7%) |
| 100M tokens | $112.5 | $215 | $102.5 (47.7%) |
| 1000M tokens | $1125 | $2150 | $1025 (47.7%) |
When to pick which
distilled from the pricing and spec data above- cost dominates: $1.13/Mtok blended vs $2.15 — 47.7% less on the same 50/50 token mix
- your workload re-reads context (agents, RAG, long chats): cached input costs $0.050/Mtok — 90% off its list input price
- this pairing gives GLM-5.3 no edge on price, context, cache discount, or measured performance — pick it only for qualitative fit (ecosystem, compliance, model behavior on your prompts)
The cheaper option here — Gemini 3 Flash Preview costs $1.13/Mtok blended on Google.
Summary
Gemini 3 Flash Preview by Google costs $0.500/Mtok input and $3.00/Mtok output, with a 1M-token context window. It supports text, image, audio, video input.
GLM-5.3 by Z.AI costs $1.40/Mtok input and $4.40/Mtok output, with a 1M-token context window. It supports text input.
On a blended cost basis, Gemini 3 Flash Preview is 47.7% cheaper than GLM-5.3.It also has a larger context window.
Note: Pricing is per million tokens. Actual costs vary with usage patterns, prompt caching, and batch discounts. Always verify against official provider pricing pages.