GPT-5.6 Sol vs Kimi K3

OpenAI's GPT-5.6 Sol against Moonshot's Kimi K3 — price, context and what each is best at. Both are available through one OpenAI-compatible API.

AnyModel — you pay	GPT-5.6 Sol	Kimi K3
Vendor	OpenAI	Moonshot
Input / 1M	$0.1	$0.15
Output / 1M	$0.1	$0.15
Context	400K	256K
Best for	Codex CLI	Complex coding

GPT-5.6 Sol

Latest frontier agentic coding model — the new Codex default.

GPT-5.6 Sol is OpenAI's newest frontier model for agentic coding: the default engine of modern Codex, tuned for long autonomous sessions, repo-scale edits and reliable tool calling. Pick it when you want the strongest coder in the GPT line.

More about GPT-5.6 Sol →

Kimi K3

Moonshot's multimodal flagship for coding, games and knowledge work.

Kimi K3 is Moonshot's newest flagship model with image understanding, served through the connected Kimi Code subscription. It requires the Moderato tier or higher and has the Kimi Code route's 256K context limit.

More about Kimi K3 →

Quick take: pick GPT-5.6 Sol when cost matters most; pick GPT-5.6 Sol when you need the largest context. With AnyModel you don't have to choose up front — switch the model id any time.

FAQ

Which is cheaper, GPT-5.6 Sol or Kimi K3?

GPT-5.6 Sol is cheaper on output tokens ($0.1 vs $0.15 per 1M).

Which has a larger context window, GPT-5.6 Sol or Kimi K3?

GPT-5.6 Sol has the larger context window (400K).