$ diff glm-5-3-flash gpt-5-6-sol
GLM-5.3-Flash vs GPT-5.6 Sol
Values come from GLM-5.3-Flash and GPT-5.6 Sol, 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
- 1.1M
- weights
- closed
- $/M in
- $4
- $/M out
- $20
What actually differs
- Context window
- GPT-5.6 Sol takes 1.1M against 1.0M — modestly more room in a single request.
- Input price
- GLM-5.3-Flash at $0.15/M against $4/M — 26.7× 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 $20/M — 40.0× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- GLM-5.3-Flash publishes weights (MIT); GPT-5.6 Sol is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- GLM-5.3-Flash shipped 48 days after GPT-5.6 Sol (2026-08-26 vs 2026-07-09).
Full spec
| Attribute | GLM-5.3-Flash | GPT-5.6 Sol |
|---|---|---|
| Developer | Z.ai | OpenAI |
| Released | 2026-08-26 | 2026-07-09 |
| Context window | 1,048,576 (1M) | 1.05M tokens |
| Pricing | $0.15/M input · $0.03/M cached input · $0.50/M output | $4/M input · $20/M output (Sol, promotional from 2026-08-21 through at least 2026-11-21; list $5/M · $30/M; family tiers below) |
| License | MIT | proprietary (API-only; no weight release) |
| Availability | Hugging Face (open weights), Z.ai API | ChatGPT (subscription), API |