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Seed 1.6 Flash vs GPT 5.6 Luna

At a glance

Fast variant of Seed 1.6 for low-latency applications.

262K ctx$0.07/$0.30 per M

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

1.1M ctx$1.00/$6.00 per M
Agent Demos
All agent demos

No shared agent demos for these models yet.

AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
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Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Reasoning & Knowledge
Graduate Science92.3%
Agentic
Terminal Tasks84.7%
Specs
262K
Context
33K
Max output
Dec 2025
Released
1.1M
Context
128K
Max output
Jul 2026
Released
Capabilities
Vision
Audio
Reasoning
Vision
Audio
Reasoning
Pricing
Live pricing, shown before you run
Input93%$0.07/M tokens
Output95%$0.30/M tokens
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/M tokens
Cache write$1.25/M tokens
Web search$0.01/search
Chat with Seed 1.6 FlashGo to model
Chat with GPT 5.6 LunaGo to model
Frequently Asked Questions: Seed 1.6 Flash vs GPT 5.6 Luna▼

Which is better, Seed 1.6 Flash or GPT 5.6 Luna?

▼

Both Seed 1.6 Flash 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, Seed 1.6 Flash or GPT 5.6 Luna?

▼

Seed 1.6 Flash has a lower blended cost. Seed 1.6 Flash: $0.07 input / $0.30 output. GPT 5.6 Luna: $1.00 input / $6.00 output.

Which has a larger context window, Seed 1.6 Flash or GPT 5.6 Luna?

▼

GPT 5.6 Luna has a larger context window: Seed 1.6 Flash supports 262K tokens vs GPT 5.6 Luna at 1.1M tokens.

Do both Seed 1.6 Flash and GPT 5.6 Luna support vision?

▼

Yes, both Seed 1.6 Flash and GPT 5.6 Luna support vision/image input.

What are the key differences between Seed 1.6 Flash and GPT 5.6 Luna?

▼

Key differences: Seed 1.6 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 Seed 1.6 Flash and GPT 5.6 Luna for free on idapt.app to see which performs better for your specific needs.

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