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 152).
- GLM-5.3-Flash is cheaper on input tokens — $0.10 vs $2.55 per 1M.
- GLM-5.3-Flash has a larger context window (1.3M vs 1M tokens).
- Kimi K3 ranks higher for coding (97th vs 83th percentile).
| Attribute | GLM-5.3-Flash | Kimi K3 |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 152 | 158 |
| Coding | 83 | 97 |
| Math | 66 | 81 |
| Reasoning & Knowledge | 56 | 73 |
| Agentic & Tools | — | 80 |
| 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 | 1.3M | 1M |
| Price — $/M input | $0.10 | $2.55 |
| Price — $/M output | $0.35 | $12.75 |
| Inputs | text, image, video | text, image, video |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 94% | 97% |
| GPQA Diamond | 90% | 93% |
| Humanity's Last Exam | 40% | 47% |
| SciCode | 52% | 60% |
| SimpleQA Verified | 32% | 51% |
| WebDev Arena | 1604 | 1674 |
| APEX | — | 39% |
| ARC-AGI | — | 95% |
| ARC-AGI-2 | — | 60% |
| 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 (152). The right pick depends on your task — 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 $0.10 per million, versus $2.55 (representative OpenRouter pricing).
Which has a larger context window, GLM-5.3-Flash or Kimi K3?
GLM-5.3-Flash supports up to 1.3M tokens, compared with 1M for the other.
Which is better for coding, GLM-5.3-Flash or Kimi K3?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Kimi K3 ranks higher — 97th vs 83th 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.