$ diff kimi-k3 gpt-5-6-sol
Kimi K3 vs GPT-5.6 Sol
Moonshot AI and OpenAI, side by side. Every value below is the one recorded on the model’s own wiki page, with its citation — nothing is estimated.
Moonshot AIKimi K3
- context
- 1M
- weights
- open
- $/M in
- $3
- $/M out
- $15
- context
- 1.1M
- weights
- closed
- $/M in
- $5
- $/M out
- $30
What actually differs
- Context window
- GPT-5.6 Sol takes 1.1M against 1M — modestly more room in a single request.
- Input price
- Kimi K3 at $3/M against $5/M — 1.7× 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
- Kimi K3 at $15/M against $30/M — 2.0× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Weights
- Kimi K3 publishes weights (Modified MIT (commercial use permitted; weights publicly downloadable)); GPT-5.6 Sol is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Kimi K3 shipped 7 days after GPT-5.6 Sol (2026-07-16 vs 2026-07-09).
Full spec
| Attribute | Kimi K3 | GPT-5.6 Sol |
|---|---|---|
| Developer | Moonshot AI | OpenAI |
| Released | 2026-07-16 | 2026-07-09 |
| Context window | 1M tokens | 1.05M tokens |
| Pricing | $0.30/M cache-hit input · $3.00/M cache-miss input · $15.00/M output | $5/M input · $30/M output (Sol; family tiers below) |
| License | Modified MIT (commercial use permitted; weights publicly downloadable) | proprietary (API-only; no weight release) |
| Availability | Kimi Code, Kimi app, Kimi API; weights on Hugging Face (`moonshot-ai/kimi-k3`, released 2026-07-27) | ChatGPT (subscription), API |
Values come from Kimi K3 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. How these pages are produced.