GLM-5.3-Flash vs Kimi K3
GLM-5.3-Flash (Z.ai (Zhipu AI)) and Kimi K3 (Moonshot) compared on benchmarks, pricing, context window, and use-case rankings.
- Kimi K3 leads on overall intelligence (ECI 158 vs 153).
- GLM-5.3-Flash is cheaper on input tokens: $0.05 vs $0.28 per 1M.
- Kimi K3 ranks higher for coding (94th vs 74th percentile).
| Attribute | GLM-5.3-Flash | Kimi K3 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 153 | 158 |
| Coding | 74 | 94 |
| Math | 49 | 64 |
| Reasoning & Knowledge | 52 | 67 |
| Agentic & Tools | 68 | 58 |
| Specifications | ||
| Developer | Z.ai (Zhipu AI) | Moonshot |
| Family | — | Kimi |
| Released | Aug 20, 2026 | Jul 16, 2026 |
| Parameters | 320B | 2.8T |
| Availability | Open weights (unrestricted) | Open weights (non-commercial) |
| Context window | 1M | 1M |
| Price — $/M input | $0.05 | $0.28 |
| Price — $/M output | $0.07 | $9.94 |
| Inputs | text, image, video | text, image, video |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 94% | 97% |
| APEX | 53% | 48% |
| ARC-AGI | 91% | 95% |
| ARC-AGI-2 | 66% | 60% |
| GPQA Diamond | 90% | 93% |
| Humanity's Last Exam | 40% | 47% |
| SciCode | 52% | 60% |
| SimpleQA Verified | 32% | 51% |
| WebDev Arena | 1607 | 1674 |
| SimpleBench | — | 61% |
| WeirdML | — | 83% |
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 GLM-5.3-Flash better than Kimi K3?
On Epoch AI's Capabilities Index, Kimi K3 scores higher (158) than GLM-5.3-Flash (153). The right pick depends on your task, so compare their coding, math, and reasoning scores in the table above.
Which is cheaper, GLM-5.3-Flash or Kimi K3?
GLM-5.3-Flash is cheaper on input tokens at $0.05 per million, versus $0.28 (representative OpenRouter pricing).
Which has a larger context window, GLM-5.3-Flash or Kimi K3?
Neither: both support up to 1M tokens.
Which is better for coding, GLM-5.3-Flash or Kimi K3?
Kimi K3 ranks higher across coding benchmarks like WebDev Arena and SciCode: 94th vs 74th 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.