Gemini 3.8 Flash vs GLM-5.3
Gemini 3.8 Flash (Google DeepMind) and GLM-5.3 (Z.ai (Zhipu AI)) compared on benchmarks, pricing, context window, and use-case rankings.
- Gemini 3.8 Flash leads on overall intelligence (ECI 159 vs 157).
- GLM-5.3 is cheaper on input tokens: $0.40 vs $0.75 per 1M.
- GLM-5.3 ranks higher for coding (89th vs 79th percentile).
| Attribute | Gemini 3.8 Flash | GLM-5.3 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 159 | 157 |
| Coding | 79 | 89 |
| Math | 73 | 35 |
| Reasoning & Knowledge | 88 | 62 |
| Agentic & Tools | 81 | 73 |
| Specifications | ||
| Developer | Google DeepMind | Z.ai (Zhipu AI) |
| Family | Gemini | — |
| Released | Sep 2, 2026 | Aug 14, 2026 |
| Parameters | — | 744B |
| Availability | API access | Open weights (restricted use) |
| Context window | 1M | 1M |
| Price — $/M input | $0.75 | $0.40 |
| Price — $/M output | $3.75 | $2.46 |
| Inputs | text, image, video, file, audio | text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 99% | 91% |
| APEX | 64% | 57% |
| ARC-AGI | 99% | — |
| ARC-AGI-2 | 89% | — |
| GPQA Diamond | 95% | 91% |
| Humanity's Last Exam | 45% | 42% |
| SciCode | 57% | 59% |
| SimpleBench | 82% | 66% |
| SimpleQA Verified | 70% | 41% |
| WebDev Arena | 1568 | 1614 |
| WeirdML | 85% | 75% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Gemini 3.8 Flash better than GLM-5.3?
On Epoch AI's Capabilities Index, Gemini 3.8 Flash scores higher (159) than GLM-5.3 (157). The right pick depends on your task, so compare their coding, math, and reasoning scores in the table above.
Which is cheaper, Gemini 3.8 Flash or GLM-5.3?
GLM-5.3 is cheaper on input tokens at $0.40 per million, versus $0.75 (representative OpenRouter pricing).
Which has a larger context window, Gemini 3.8 Flash or GLM-5.3?
Neither: both support up to 1M tokens.
Which is better for coding, Gemini 3.8 Flash or GLM-5.3?
GLM-5.3 ranks higher across coding benchmarks like WebDev Arena and SciCode: 89th vs 79th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.