GPT-5.5 vs Kimi K2.6
OpenAI vs Moonshot — Kimi K2.6 is 81% cheaper on input and 87% cheaper on output, while GPT-5.5 offers 4.1x more context.
Pricing data verified: Jun 10, 2026
| Specification | GPT-5.5 | Kimi K2.6 |
|---|---|---|
| Input Price (per 1M tokens) | $5.00 | $0.95 |
| Output Price (per 1M tokens) | $30.00 | $4.00 |
| Context Window | 1.05M tokens | 256K tokens |
| Tier | Flagship | Mid |
| Provider | OpenAI | Moonshot |
| Input Savings | Baseline | 81% cheaper |
| Output Savings | Baseline | 87% cheaper |
| Cost at 1M input + 500K output | $20.00 | $2.95 |
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Which Model for Which Use Case?
Cost-Sensitive Workloads
Kimi K2.6 is 81-87% cheaper across the board — ideal for high-volume applications where cost per token matters. At $0.95/M input, it's a fraction of GPT-5.5's $5.00/M.
Long-Context Processing
GPT-5.5's 1.05M context window is 4.1x larger than Kimi K2.6's 256K. For processing lengthy documents, maintaining large conversation histories, or handling complex RAG pipelines, GPT-5.5 gives you significantly more room.
Global Availability
GPT-5.5 benefits from OpenAI's global infrastructure with availability across all regions. If your application requires worldwide access with low latency, GPT-5.5's broader deployment is an advantage.
Integration Ecosystem
GPT-5.5 integrates with OpenAI's extensive ecosystem — plugins, function calling, and a wide range of third-party tools. If your stack is built on OpenAI's platform, GPT-5.5 offers the smoothest integration path.
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Frequently Asked Questions
Is Kimi K2.6 cheaper than GPT-5.5?
Yes. Kimi K2.6 costs $0.95/M input and $4.00/M output. GPT-5.5 costs $5.00/M input and $30.00/M output. Kimi is 81% cheaper on input and 87% cheaper on output. For a typical workload of 1M input + 500K output tokens/month, Kimi costs $2.95 vs GPT-5.5's $20.00 — saving $17.05/month (85%).
Which has a larger context window, GPT-5.5 or Kimi K2.6?
GPT-5.5 has a 1.05M token context window, which is 4.1x larger than Kimi K2.6's 256K context. If you need to process long documents or maintain extensive conversation histories, GPT-5.5 offers significantly more room. For typical workloads under 256K tokens, both models are equally capable.
When should I choose GPT-5.5 over Kimi K2.6?
Choose GPT-5.5 when: (1) you need OpenAI's ecosystem and integrations, (2) your workload requires more than 256K context, (3) you need broader global availability. Choose Kimi K2.6 when: (1) cost efficiency matters (81-87% cheaper), (2) your workload fits within 256K context, (3) you want significant cost savings at scale.
Are GPT-5.5 and Kimi K2.6 good for production use?
Both are production-ready. GPT-5.5 is OpenAI's latest flagship, offering a massive 1.05M context window and global availability. Kimi K2.6 from Moonshot is a strong value proposition at 81-87% lower cost. Both have enterprise-grade reliability and support production workloads.