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Compare AI models side by side

Choose up to 4 models. Prices, context windows and declared capabilities are read live from the OpenRouter listing, so the table reflects what the providers publish today.

~OpenaiGPT Luna LatestDeepSeekDeepSeek V3.1 Terminus
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Side-by-side comparison of OpenAI: GPT Luna Latest, DeepSeek: DeepSeek V3.1 Terminus
Attribute
~OpenaiGPT Luna Latest~openai/gpt-luna-latest
DeepSeekDeepSeek V3.1 Terminusdeepseek/deepseek-v3.1-terminus
Input priceUSD per 1M tokens$0.20 (best)$0.27
Output priceUSD per 1M tokens$1.20$1.00 (best)
Blended price75% in / 25% out$0.45 (best)$0.45
Vs. market median44% cheaper43% cheaper
Value rankcheapest = 1#142 (best)#147
Context windowtokens1.1M (best)164K
Max outputtokens128K (best)33K
Input modalitiesfile, image, texttext
Output modalitiestexttext
Tool callingDeclaredDeclared
ReasoningDeclaredDeclared
Structured outputDeclaredDeclared
Listed on OpenRouter2026-09-11 (best)2025-09-22

Source: OpenRouter (live)

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Read-out

What the numbers say

  • OpenAI: GPT Luna Latest is the cheapest here at $0.45/M blended — 1.0× less than DeepSeek: DeepSeek V3.1 Terminus.
  • OpenAI: GPT Luna Latest offers the largest context window (1.1M tokens) versus 164K for DeepSeek: DeepSeek V3.1 Terminus.

Generated from the live figures above. Capabilities are what each provider declares on its listing.

Curated

Head-to-heads we keep up to date

Each comparison resolves to the newest models in the named families and carries our own guidance on which to choose.

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