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Kimi K2 Thinking vs GPT 6 Astra

At a glance

Kimi K2 with always-on extended reasoning for complex problem solving.

262K ctx$0.60/$2.50 per M

OpenAI's new flagship for demanding end-to-end work: advanced analysis, software engineering, deep research, scientific work, and document creation.

1.1M ctx$10.00/$50.00 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper95%
Reasoning & Knowledge
Graduate Science—Factual Recall—
Math
Competition Math—
Agentic
Novel Reasoning—
Reasoning
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-10-02
Reasoning & Knowledge
Graduate Science95.8%Factual Recall75.6%
Math
Competition Math100.0%
Agentic
Novel Reasoning95.0%
Specs
262K
Context
98K
Max output
Nov 2025
Released
1.1M
Context
128K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input94%$0.60/M tokens
Output95%$2.50/M tokens
Cache read85%$0.15/M tokens
Live pricing, shown before you run
Input$10.00/M tokens
Output$50.00/M tokens
Cache read$1.00/M tokens
Cache write$12.50/M tokens
Web search$0.01/search
Chat with Kimi K2 ThinkingGo to model
Chat with GPT 6 AstraGo to model
Frequently Asked Questions: Kimi K2 Thinking vs GPT 6 Astra▼

Which is better, Kimi K2 Thinking or GPT 6 Astra?

▼

Both Kimi K2 Thinking and GPT 6 Astra are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, Kimi K2 Thinking or GPT 6 Astra?

▼

Kimi K2 Thinking has a lower blended cost. Kimi K2 Thinking: $0.60 input / $2.50 output. GPT 6 Astra: $10.00 input / $50.00 output.

Which has a larger context window, Kimi K2 Thinking or GPT 6 Astra?

▼

GPT 6 Astra has a larger context window: Kimi K2 Thinking supports 262K tokens vs GPT 6 Astra at 1.1M tokens.

Do both Kimi K2 Thinking and GPT 6 Astra support vision?

▼

GPT 6 Astra supports vision/image input, but Kimi K2 Thinking does not.

What are the key differences between Kimi K2 Thinking and GPT 6 Astra?

▼

Key differences: Kimi K2 Thinking is significantly cheaper; only GPT 6 Astra supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Kimi K2 Thinking and GPT 6 Astra for free on idapt.app to see which performs better for your specific needs.

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