GPT-6 Astra Pro vs Kimi K3
Price, context window & benchmark comparison
VS
Compare different models
Verdict: Kimi K3 is 3.3× cheaper than GPT-6 Astra Pro on a typical 3:1 input/output mix. GPT-6 Astra Pro has the larger context window (1.1M vs 1M).
| GPT-6 Astra Pro | Kimi K3 | |
|---|---|---|
| Input price / 1M | $10.00 | $3.00 |
| Output price / 1M | $50.00 | $15.00 |
| Blended price (3:1) | $20.00 | $6.00 |
| Cached input / 1M | $1.00 | $0.30 |
| Context window | 1.1M | 1M |
| Max output | 128K | 944K |
| Intelligence index | — | 43.6 |
| Coding index | — | 76.2 |
| Providers | 5 | 20 |
| Best provider uptime (30m) | 100.0% | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-04 | 2026-07-16 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GPT-6 Astra Pro or Kimi K3?
Kimi K3 is 3.3× cheaper than GPT-6 Astra Pro on a typical 3:1 input/output mix.
GPT-6 Astra Pro vs Kimi K3: which has a bigger context window?
GPT-6 Astra Pro: 1,050,000 tokens. Kimi K3: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-6 Astra Pro ≈ $45,000, Kimi K3 ≈ $13,500.
More comparisons
GPT-6 Astra Pro vs GLM 5.3 PrimeGPT-6 Astra Pro vs Qwen3.8 Max PrimeGPT-6 Astra Pro vs Command A+GPT-6 Astra Pro vs GPT-6 Luna ProGPT-6 Astra Pro vs GPT-6 LunaGPT-6 Astra Pro vs GPT-6 Sol ProGPT-6 Astra Pro vs GPT-6 SolGPT-6 Astra Pro vs Claude Opus 5.5GPT-6 Astra Pro vs MiMo-V2.6-Pro-UltraSpeedGPT-6 Astra Pro vs MiMo-V2.6-FlashGPT-6 Astra Pro vs Grok 4.7GPT-6 Astra Pro vs Qwen3.8 Omni FlashGPT-6 Astra Pro vs GLM 5.3 FlashXGPT-6 Astra Pro vs DeepSeek V4.1 FlashGPT-6 Astra Pro vs GPT-6 AstraGPT-6 Astra Pro vs Qwen3.8 Max (0902)Kimi K3 vs GLM 5.3 PrimeKimi K3 vs Qwen3.8 Max PrimeKimi K3 vs Command A+Kimi K3 vs GPT-6 Luna ProKimi K3 vs GPT-6 LunaKimi K3 vs GPT-6 Sol ProKimi K3 vs GPT-6 SolKimi K3 vs Claude Opus 5.5