Compare AI models
| Specifications | ||
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 400k | 2M |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $12.50 | — |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $75.00 | — |
Cached input priceA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again. | $1.25 | — |
| $6,250OpenAI list price | — | |
| These models have no shared benchmark scores. | ||
Advanced Cybersecurity Completion Rate (Internal)Agentic tasks — share of advanced cyber requests the model responds to; measures willingness to answer, not exploit success | 95% | — |
| Overview | ||
| Company | OpenAI | SpaceXSI |
| Release date | Aug 10 2026 | Sep 19 2025 |
| Access | Closed | Closed |
| Model details | View model | View model |
Other comparisons
GPT-5.6 CybervsClaude Fable 5.2Grok 4 FastvsClaude Fable 5.2GPT-5.6 CybervsGemini 4 CarbonGrok 4 FastvsGemini 4 CarbonGPT-5.6 CybervsMuse EmberGrok 4 FastvsMuse EmberGPT-5.6 CybervsDeepSeek-V4.1-Flash-1017Grok 4 FastvsDeepSeek-V4.1-Flash-1017GPT-5.6 CybervsMistral Large 4Grok 4 FastvsMistral Large 4GPT-5.6 CybervsKimi K3.1 ProGrok 4 FastvsKimi K3.1 ProFrequently asked questions
GPT-5.6 Cyber and Grok 4 Fast don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Only GPT-5.6 Cyber has a verified first-party price for an available API: $12.50 per million input tokens and $75.00 per million output tokens. No currently available pay-as-you-go API rate is tracked for Grok 4 Fast. Grok 4 Fast shipped 325 days before GPT-5.6 Cyber, so benchmark comparisons should account for the intervening progress.
Context windows are 400k (GPT-5.6 Cyber) vs 2M (Grok 4 Fast).
Direct benchmark comparisons are unavailable — GPT-5.6 Cyber and Grok 4 Fast don't publish scores on any of the same benchmarks.