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DeepSeek V3.1 vs GPT 5.6 Luna

At a glance
DeepSeekDeepSeek V3.1

Large hybrid reasoning model supporting thinking and non-thinking modes.

72164K ctx$0.21/$0.79 per M#54/92
OpenAIGPT 5.6 Luna

OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.

1.1M ctx$1.00/$6.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
DeepSeekDeepSeek V3.1
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch ECI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI71.6
Reasoning & Knowledge
Graduate Science—
Agentic
Terminal Tasks—
OpenAIGPT 5.6 Luna
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Capability
Capability—
Reasoning & Knowledge
Graduate Science92.3%
Agentic
Terminal Tasks84.7%
Specs
DeepSeekDeepSeek V3.1
164K
Context
33K
Max output
Aug 2025
Released
OpenAIGPT 5.6 Luna
1.1M
Context
128K
Max output
Jul 2026
Released
Capabilities
DeepSeekDeepSeek V3.1
Vision
Audio
Reasoning
OpenAIGPT 5.6 Luna
Vision
Audio
Reasoning
Pricing
DeepSeekDeepSeek V3.1
Live pricing, shown before you run
Input$0.21/M tokens
Output$0.79/M tokens
Cache read$0.13/M tokens
OpenAIGPT 5.6 Luna
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/M tokens
Web search$0.01/search
Chat with DeepSeek V3.1Go to model
Chat with GPT 5.6 LunaGo to model
Frequently Asked Questions: DeepSeek V3.1 vs GPT 5.6 Luna▼

Which is better, DeepSeek V3.1 or GPT 5.6 Luna?

▼

Both DeepSeek V3.1 and GPT 5.6 Luna are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, DeepSeek V3.1 or GPT 5.6 Luna?

▼

DeepSeek V3.1 has a lower blended cost. DeepSeek V3.1: $0.21 input / $0.79 output. GPT 5.6 Luna: $1.00 input / $6.00 output.

Which has a larger context window, DeepSeek V3.1 or GPT 5.6 Luna?

▼

GPT 5.6 Luna has a larger context window: DeepSeek V3.1 supports 164K tokens vs GPT 5.6 Luna at 1.1M tokens.

Do both DeepSeek V3.1 and GPT 5.6 Luna support vision?

▼

GPT 5.6 Luna supports vision/image input, but DeepSeek V3.1 does not.

What are the key differences between DeepSeek V3.1 and GPT 5.6 Luna?

▼

Key differences: DeepSeek V3.1 is significantly cheaper; only GPT 5.6 Luna supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both DeepSeek V3.1 and GPT 5.6 Luna for free on idapt.app to see which performs better for your specific needs.

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