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Comparisons
Each page states who the left option is for and who the right option is for. It does not tell you to hedge.
Updated 2026-09-22
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Head to head
GPT-6.1 Sol vs GPT-6 Sol
GPT-6.1 Sol is the newer coding id, with a cheaper cache read than GPT-6 Sol. Both stay on the OpenAI plan. Rates load live.
GPT-6 Sol vs GPT-6 Astra
GPT-6 Sol is the coding id below Astra. GPT-6 Astra is the flagship OpenAI id. Both stay on the OpenAI plan. Rates load live.
GPT-6 Sol vs GPT-6 Luna
GPT-6 Sol is for complex coding and agents. GPT-6 Luna is the efficient high-volume id. Same OpenAI plan. Rates load live.
GPT-6 Luna vs GPT-5.6 Luna
GPT-6 Luna is the efficient GPT-6 id. GPT-5.6 Luna stays the smallest GPT-5.6 id. Keep the id a script already sends.
GPT-6 Sol vs GPT-5.6 Sol
GPT-6 Sol is the newer coding id. GPT-5.6 Sol stays the Codex and Cursor example. Do not rename an existing config.
GPT-5.6 Sol vs GPT-5.5
Both are OpenAI-plan ids. Sol is the current setup example. GPT-5.5 is the id in the public curl example.
Grok 4.6 vs GPT-5.6 Sol
Grok 4.6 is the Grok Heavy example id. GPT-5.6 Sol is the OpenAI example id. Different plans, different keys.
Gemini 3.1 Pro vs Claude Sonnet 5
Gemini 3.1 Pro uses the /v1beta host on Antigravity. Claude Sonnet 5 uses the Anthropic host. Different keys.
Token Supply vs the official API
Token Supply is prepaid access to the same model ids at listed rates. The official API bills you at the provider list price.
Token Supply vs OpenRouter
Token Supply is a prepaid key for GPT, Claude, Grok, and Gemini ids. OpenRouter is a separate catalog with its own prices.
What a comparison page answers
Which client and which model id. Not a generic feature grid.
Related
- Best coding-agent model — The pick is GPT-5.6 Sol.