Model Comparison

Kimi K2.7 Code vs GPT-5.5Which is better in 2026?

Both models are evenly matched across the benchmarks. Kimi K2.7 Code is 7.9x cheaper per token.

Verdict: Kimi K2.7 Code vs GPT-5.5 — which is better?

Kimi K2.7 Code (by Moonshot AI) and GPT-5.5 (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Kimi K2.7 Code outperforms in 1 benchmarks (MCP Atlas), while GPT-5.5 is better at 1 benchmark (LiveBench). Both models are evenly matched across the benchmarks.

On price, Kimi K2.7 Code is roughly 7.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.5 also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Kimi K2.7 Code if…

  • cost matters — it's about 7.9x cheaper per token
  • you want the most recent training data — it shipped Jun 2026
  • you need open weights you can self-host or fine-tune

Choose GPT-5.5 if…

  • you process long inputs — it offers a 1,050,000 token context window

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Kimi K2.7 Code outperforms in 1 benchmarks (MCP Atlas), while GPT-5.5 is better at 1 benchmark (LiveBench).

Both models are evenly matched across the benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Kimi K2.7 Code costs less

For input processing, Kimi K2.7 Code ($0.74/1M tokens) is 6.8x cheaper than GPT-5.5 ($5.00/1M tokens).

For output processing, Kimi K2.7 Code ($3.50/1M tokens) is 8.6x cheaper than GPT-5.5 ($30.00/1M tokens).

In conclusion, GPT-5.5 is more expensive than Kimi K2.7 Code.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
Moonshot AI
Kimi K2.7 Code
Input tokens$0.74
Output tokens$3.50
Best providerDeepinfra
OpenAI
GPT-5.5
Input tokens$5.00
Output tokens$30.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.5 accepts 1,050,000 input tokens compared to Kimi K2.7 Code's 262,144 tokens. Kimi K2.7 Code can generate longer responses up to 131,072 tokens, while GPT-5.5 is limited to 128,000 tokens.

Moonshot AI
Kimi K2.7 Code
Input262,144 tokens
Output131,072 tokens
OpenAI
GPT-5.5
Input1,050,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Kimi K2.7 Code and GPT-5.5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Kimi K2.7 Code

Text
Images
Audio
Video

GPT-5.5

Text
Images
Audio
Video

License

Usage and distribution terms

Kimi K2.7 Code is licensed under Modified MIT License, while GPT-5.5 uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

Kimi K2.7 Code

Modified MIT License

Open weights

GPT-5.5

Proprietary

Closed source

Release Timeline

When each model was launched

Kimi K2.7 Code was released on 2026-06-12, while GPT-5.5 was released on 2026-04-23.

Kimi K2.7 Code is 2 months newer than GPT-5.5.

Kimi K2.7 Code

Jun 12, 2026

1 months ago

1mo newer
GPT-5.5

Apr 23, 2026

2 months ago

Knowledge Cutoff

When training data ends

GPT-5.5 has a documented knowledge cutoff of 2025-12-01, while Kimi K2.7 Code's cutoff date is not specified.

We can confirm GPT-5.5's training data extends to 2025-12-01, but cannot make a direct comparison without Kimi K2.7 Code's cutoff date.

Kimi K2.7 Code

—

GPT-5.5

Dec 2025

Provider Availability

Kimi K2.7 Code is available from DeepInfra, Fireworks, Moonshot AI, Novita, Together. GPT-5.5 is available from OpenAI.

Kimi K2.7 Code

deepinfra logo
Deepinfra
Input Price:Input: $0.74/1MOutput Price:Output: $3.50/1M
fireworks logo
Fireworks
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
moonshot logo
Unknown Organization
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
novita logo
Novita
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M
together logo
Together
Input Price:Input: $0.95/1MOutput Price:Output: $4.00/1M

GPT-5.5

openai logo
OpenAI
Input Price:Input: $5.00/1MOutput Price:Output: $30.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Moonshot AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher MCP Atlas score (76.0% vs 75.3%)
OpenAI
Larger context window (1,050,000 tokens)
Higher LiveBench score (80.7% vs 71.9%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Kimi K2.7 Code and GPT-5.5 side-by-side, then vote on the output you prefer.

Kimi K2.7 Code
✓ Preferred
GPT-5.5
Open in Playground
AI Model Comparison Table
Feature
Moonshot AI
Kimi K2.7 Code
OpenAI
GPT-5.5

FAQ

Common questions about Kimi K2.7 Code vs GPT-5.5.

Which is better, Kimi K2.7 Code or GPT-5.5?

Both models are evenly matched across the benchmarks. Kimi K2.7 Code is made by Moonshot AI and GPT-5.5 is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Kimi K2.7 Code compare to GPT-5.5 in benchmarks?

Kimi K2.7 Code scores MCP-Mark: 81.1%, MCP Atlas: 76.0%, LiveBench: 71.9%, Kimi Code Bench v2: 62.0%, Program Bench: 53.6%. GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%.

Is Kimi K2.7 Code cheaper than GPT-5.5?

Kimi K2.7 Code is 6.8x cheaper for input tokens. Kimi K2.7 Code costs $0.74/M input and $3.50/M output via deepinfra. GPT-5.5 costs $5.00/M input and $30.00/M output via openai.

What are the context window sizes for Kimi K2.7 Code and GPT-5.5?

Kimi K2.7 Code supports 262K tokens and GPT-5.5 supports 1.1M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Kimi K2.7 Code and GPT-5.5?

Key differences include context window (262K vs 1.1M), input pricing ($0.74 vs $5.00/M), licensing (Modified MIT License vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes Kimi K2.7 Code and GPT-5.5?

Kimi K2.7 Code is developed by Moonshot AI and GPT-5.5 is developed by OpenAI.

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