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grok-4-1-fast-non-reasoning vs GPT-6 Luna

Both have similar output pricing, while grok-4-1-fast-non-reasoning offers a larger context window. Choose grok-4-1-fast-non-reasoning or GPT-6 Luna based on the trade-off between cost, context, and the benchmarks that matter for your use case.

Specgrok-4-1-fast-non-reasoningGPT-6 Luna
Provider302.AIOpenAI
Input / 1M tokens$0.20$0.10
Output / 1M tokens$0.50$0.50
Context window2M1.1M
Parameters——
Open weightsNo—
ReleasedNov 2025—
GPQA Diamond score—90.5
LMArena (Chatbot Arena) Elo score—1392
LMArena WebDev Elo score—1582
LMArena Vision Elo score—1217
Epoch Capabilities Index score—156

FAQ

Is grok-4-1-fast-non-reasoning or GPT-6 Luna cheaper?

grok-4-1-fast-non-reasoning and GPT-6 Luna have comparable output pricing.

Which has the larger context window, grok-4-1-fast-non-reasoning or GPT-6 Luna?

grok-4-1-fast-non-reasoning has the larger context window (2M tokens).

Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.