Head to head
GLM-5.3 vs Kimi K3
GLM-5.3 from Z.ai (Zhipu) against Kimi K3 from Moonshot AI — specification, price and every benchmark both makers have published, in one table.
Benchmarks
No shared benchmarks
These two models have no benchmark in common with published figures for both, so there is nothing to compare directly. The specification and price rows below are still like for like.
Price
GLM-5.3 is cheaper
On a 3:1 input-to-output mix, GLM-5.3 costs $2.15 per million tokens against $6.00 for Kimi K3 — about 2.8× less. Remember that a reasoning model bills its thinking as output, so cost per answer can diverge much further than cost per token.
What actually differs
- Kimi K3 takes 1M tokens of context against 1M — 1.0× more room for long documents or a large codebase.
Scorecard
Which is better at what
Maths, coding, reasoning and the rest — one line each, averaged over the benchmarks both models actually report.
GLM-5.3 and Kimi K3 have no published benchmark scores
Their maker has not released figures for any of the evaluations tracked here, so there is nothing to put in a score column. Rather than estimate, infer from a sibling model, or quote the base model's numbers as if they were their own, this page leaves those rows empty and compares what genuinely can be compared: parameters, context window, modalities, licence and cost.
The moment those figures are published they go in — send them with a link to the source.
| Category | GLM-5.3 | Kimi K3 | Better at this |
|---|---|---|---|
| ReasoningNeither model reports this | — | — | Not comparable |
| MathsNeither model reports this | — | — | Not comparable |
| CodingNeither model reports this | — | — | Not comparable |
| KnowledgeNeither model reports this | — | — | Not comparable |
| MultimodalNeither model reports this | — | — | Not comparable |
| Instruction followingNeither model reports this | — | — | Not comparable |
| Human preferenceNeither model reports this | — | — | Not comparable |
| Categories won | No category has a test both models report | ||
Each category averages only the benchmarks every model here reports, so no one is credited for a test the other did not run. A category with no shared test is marked Not comparable rather than guessed at.
Side by side
GLM-5.3 and Kimi K3, row by row
| Attribute | GLM-5.3Z.ai (Zhipu) | Kimi K3Moonshot AI |
|---|---|---|
| Specification | ||
| MakerWho built it | Z.ai (Zhipu) | Moonshot AI |
| Released | 2026-08 | 2026-07 |
| ParametersTotal, and active per token for a mixture of experts | 753B total / 39B active | 2.8T total / 104B active |
| Architecture | MoE | MoE |
| Context windowHow much can go in at once | 1,000,000 tokens | 1,048,576 tokens |
| Max output | Not reported | 1,048,576 tokens |
| Input | Text, Image | Text, Image |
| ReasoningSpends extra tokens thinking before it answers | Yes | Yes |
| Tool calling | Yes | Yes |
| Licence | GLM-5.3 License | Kimi K3 License |
| Open weightsCan you download and run it yourself | Yes | Yes |
| Price | ||
| Input priceUSD per million tokens in | $1.40 | $3.00 |
| Output priceUSD per million tokens out | $4.40 | $15.00 |
| Cached input | $0.26 | $0.30 |
| Blended 3:1A 3-in-to-1-out million-token mix — a fairer single number than input price alone | $2.15Cheapest | $6.00 |
| Price note | Open weights — this is a representative hosting rate, not a first-party price. Running it yourself costs only hardware. | Open weights — this is a representative hosting rate, not a first-party price. Running it yourself costs only hardware. |
| Published benchmarks | ||
| Scores | No published figures | No published figures |
| Links | Hugging Face · Full page | Hugging Face · Full page |
| Row verified | 2026-09 | 2026-09 |
Where these numbers come from
Every score on this page is a published figure, taken from the model's own card, system card, technical report or release post, or from a public leaderboard. CorX Labs did not run these evaluations. Most are self-reported by the lab that built the model, which means they were produced under that lab's own choice of prompt, scaffold and number of attempts — so treat them as a starting point for a shortlist, not as a settled ranking.
A score someone other than the model's maker measured is marked Independent and names its measurer. Those are the stronger numbers on this page — an outside harness has no reason to flatter anyone — and there are not many of them.
Where a figure has not been published, the cell reads Not reported rather than an estimate. Nothing here is inferred, interpolated or guessed. Each model records the month its row was last checked. Full method and caveats.
Questions
GLM-5.3 or Kimi K3?
Is GLM-5.3 better than Kimi K3?
These two models have no benchmark in common with published figures for both, so there is nothing to compare directly. The specification and price rows below are still like for like.
Which is cheaper, GLM-5.3 or Kimi K3?
On a 3:1 input-to-output mix, GLM-5.3 costs $2.15 per million tokens against $6.00 for Kimi K3 — about 2.8× less. Remember that a reasoning model bills its thinking as output, so cost per answer can diverge much further than cost per token.
What is the difference between GLM-5.3 and Kimi K3?
Kimi K3 takes 1M tokens of context against 1M — 1.0× more room for long documents or a large codebase.
