GPT-6 Astra vs Kimi K2 0905
GPT-6 Astra leads the LLM Stats Score 59.9 to 21.6. Kimi K2 0905 is 18.6x cheaper per token.
OpenAI · Moonshot AI · Updated for 2026
Which is better?
GPT-6 Astra leads the overall LLM Stats Score 59.9 to 21.6, ranking #1 overall.
In the 1 individual benchmarks reported for both models, GPT-6 Astra wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, Kimi K2 0905 is roughly 18.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
GPT-6 Astra also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose GPT-6 Astra
- overall performance matters — it scores 59.9 and ranks #1 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- you process long inputs — it offers a 1,050,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Kimi K2 0905
- cost matters — it's about 18.6x cheaper per token
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
22 reported for GPT-6 Astra · 6 for Kimi K2 0905
GPT-6 Astra outperforms in 1 benchmarks (GPQA), while Kimi K2 0905 is better at 0 benchmarks.
GPT-6 Astra significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, GPT-6 Astra ($10.00/1M tokens) is 16.7x more expensive than Kimi K2 0905 ($0.60/1M tokens).
For output processing, GPT-6 Astra ($50.00/1M tokens) is 20.0x more expensive than Kimi K2 0905 ($2.50/1M tokens).
In conclusion, GPT-6 Astra is more expensive than Kimi K2 0905.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
GPT-6 Astra accepts 1,050,000 input tokens compared to Kimi K2 0905's 262,144 tokens. Kimi K2 0905 can generate longer responses up to 262,144 tokens, while GPT-6 Astra is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
GPT-6 Astra supports multimodal inputs, whereas Kimi K2 0905 does not.
GPT-6 Astra can handle both text and other forms of data like images, making it suitable for multimodal applications.
GPT-6 Astra
Kimi K2 0905
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
GPT-6 Astra was released on 2026-09-04, while Kimi K2 0905 was released on 2025-09-05.
GPT-6 Astra is 12 months newer than Kimi K2 0905.
Sep 4, 2026
6 days ago
12mo newerSep 5, 2025
1.0 years ago
Knowledge Cutoff
When training data ends
GPT-6 Astra has a documented knowledge cutoff of 2026-04-30, while Kimi K2 0905's cutoff date is not specified.
We can confirm GPT-6 Astra's training data extends to 2026-04-30, but cannot make a direct comparison without Kimi K2 0905's cutoff date.
Apr 2026
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Provider Availability
GPT-6 Astra is available from OpenAI. Kimi K2 0905 is available from Novita.
GPT-6 Astra
Kimi K2 0905
Outputs Comparison
Judge for yourself.
Run your own prompts against GPT-6 Astra and Kimi K2 0905 side-by-side, then vote on the output you prefer.
FAQ
Common questions about GPT-6 Astra vs Kimi K2 0905.