$ diff glm-5-3-flash longcat-2-0
GLM-5.3-Flash vs LongCat-2.0
Values come from GLM-5.3-Flash and LongCat-2.0, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
Z.aiGLM-5.3-Flash
- context
- 1.0M
- weights
- open
- $/M in
- $0.15
- $/M out
- $0.5
- context
- 1M
- weights
- open
- $/M in
- $0.3
- $/M out
- $1.2
What actually differs
- Context window
- GLM-5.3-Flash takes 1.0M against 1M — modestly more room in a single request.
- Input price
- GLM-5.3-Flash at $0.15/M against $0.3/M — 2.0× cheaper to feed. Standard rates: one of these labs also quotes a lower cached-input tier, which applies only when a prefix is reused — see the full spec below.
- Output price
- GLM-5.3-Flash at $0.5/M against $1.2/M — 2.4× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- Both publish weights — GLM-5.3-Flash under MIT, LongCat-2.0 under MIT (commercially permissive). Check the licences rather than assuming they permit the same commercial use.
- Recency
- GLM-5.3-Flash shipped 57 days after LongCat-2.0 (2026-08-26 vs 2026-06-30).
Full spec
| Attribute | GLM-5.3-Flash | LongCat-2.0 |
|---|---|---|
| Developer | Z.ai | Meituan |
| Released | 2026-08-26 | 2026-06-30 |
| Context window | 1,048,576 (1M) | 1 million tokens (LongCat Sparse Attention / LSA) |
| Pricing | $0.15/M input · $0.03/M cached input · $0.50/M output | $0.30/M input · $1.20/M output ($0.006/M cached input) — OpenRouter catalogue, read 2026-07-28. Open weights, so this is hosted-inference pricing rather than a licence fee. |
| License | MIT | MIT (commercially permissive) |
| Availability | Hugging Face (open weights), Z.ai API | Open-sourced 2026-06-30; previously served on OpenRouter under the codename "Owl Alpha" |