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GPT 6 Luna Pro vs Seed 1.6 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

Fast variant of Seed 1.6 for low-latency applications.

262K ctx$0.07/$0.30 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
Cheaper34%
Specs
1.1M
Context
128K
Max output
Sep 2026
Released
262K
Context
33K
Max output
Dec 2025
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
Input25%$0.07/M tokens
Output40%$0.30/M tokens
Chat with GPT 6 Luna ProGo to model
Chat with Seed 1.6 FlashGo to model
Frequently Asked Questions: GPT 6 Luna Pro vs Seed 1.6 Flash▼

Which is better, GPT 6 Luna Pro or Seed 1.6 Flash?

▼

Both GPT 6 Luna Pro and Seed 1.6 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 Seed 1.6 Flash?

▼

Seed 1.6 Flash has a lower blended cost. GPT 6 Luna Pro: $0.10 input / $0.50 output. Seed 1.6 Flash: $0.07 input / $0.30 output.

Which has a larger context window, GPT 6 Luna Pro or Seed 1.6 Flash?

▼

GPT 6 Luna Pro has a larger context window: GPT 6 Luna Pro supports 1.1M tokens vs Seed 1.6 Flash at 262K tokens.

Do both GPT 6 Luna Pro and Seed 1.6 Flash support vision?

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Yes, both GPT 6 Luna Pro and Seed 1.6 Flash support vision/image input.

What are the key differences between GPT 6 Luna Pro and Seed 1.6 Flash?

▼

GPT 6 Luna Pro and Seed 1.6 Flash have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.

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 Seed 1.6 Flash for free on idapt.app to see which performs better for your specific needs.

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