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GPT 6 Luna Pro vs DeepSeek V4.1 Flash

At a glance

OpenAI's GPT-6 Luna served in pro reasoning mode for the hardest problems.

1.1M ctx$0.10/$0.50 per M

DeepSeek's cost-efficient V4.1 tier and the first model built on the Causal Encoder-Decoder (CED) architecture: a 552B MoE activating 8B parameters on input and 16B on output.

1.0M ctx$0.03/$0.50 per M
Demos
All demos

No shared demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:OpenRouter
Cheaper26%
Specs
1.1M
Context
128K
Max output
Sep 2026
Released
1.0M
Context
256K
Max output
Sep 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input$0.10/M tokens
Output$0.50/M tokens
Cache read$0.01/M tokens
Cache write$0.13/M tokens
Web search$0.01/search
Live pricing, shown before you run
Input70%$0.03/M tokens
Output$0.50/M tokens
Cache read$0.01/M tokens
Chat with GPT 6 Luna ProGo to model
Chat with DeepSeek V4.1 FlashGo to model
Frequently Asked Questions: GPT 6 Luna Pro vs DeepSeek V4.1 Flash▼

Which is better, GPT 6 Luna Pro or DeepSeek V4.1 Flash?

▼

Both GPT 6 Luna Pro and DeepSeek V4.1 Flash 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, GPT 6 Luna Pro or DeepSeek V4.1 Flash?

▼

DeepSeek V4.1 Flash has a lower blended cost. GPT 6 Luna Pro: $0.10 input / $0.50 output. DeepSeek V4.1 Flash: $0.03 input / $0.50 output.

Which has a larger context window, GPT 6 Luna Pro or DeepSeek V4.1 Flash?

▼

GPT 6 Luna Pro has a larger context window: GPT 6 Luna Pro supports 1.1M tokens vs DeepSeek V4.1 Flash at 1M tokens.

Do both GPT 6 Luna Pro and DeepSeek V4.1 Flash support vision?

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Yes, both GPT 6 Luna Pro and DeepSeek V4.1 Flash support vision/image input.

What are the key differences between GPT 6 Luna Pro and DeepSeek V4.1 Flash?

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Key differences: DeepSeek V4.1 Flash is significantly cheaper. 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 GPT 6 Luna Pro and DeepSeek V4.1 Flash for free on idapt.app to see which performs better for your specific needs.

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