GPT-5.6 Luna vs Seed-2.0-Lite: side-by-side summary

GPT-5.6 Luna and Seed-2.0-Lite are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Luna, from OpenAI, has a 1,050,000-token context window and is priced at $0.10/M tokens input, $0.60/M tokens output on OpenRouter.

Seed-2.0-Lite, from bytedance-seed, has a 262,144-token context window and is priced at $0.25/M tokens input, $2/M tokens output on OpenRouter.

Context window

• GPT-5.6 Luna: 1,050,000 tokens
• Seed-2.0-Lite: 262,144 tokens

Price

• GPT-5.6 Luna: $0.10/M tokens input, $0.60/M tokens output
• Seed-2.0-Lite: $0.25/M tokens input, $2/M tokens output

Provided by

• GPT-5.6 Luna: OpenAI
• Seed-2.0-Lite: bytedance-seed

• GPT-5.6 Luna model details, providers and pricing
• Seed-2.0-Lite model details, providers and pricing