GPT-5.1 vs Seed 2.0 Lite

Compare GPT-5.1 by OpenAI against Seed 2.0 Lite by ByteDance, context windows of 400K vs 262K, tested across 50 shared challenges. Updated March 2026.

Which is better, GPT-5.1 or Seed 2.0 Lite?

GPT-5.1 and Seed 2.0 Lite are both competitive models. GPT-5.1 costs $1.25/M input tokens vs $0.25/M for Seed 2.0 Lite. Context windows: 400K vs 262K tokens. Compare their real outputs side by side below.

Key Differences Between GPT-5.1 and Seed 2.0 Lite

GPT-5.1 is made by openai while Seed 2.0 Lite is from bytedance. GPT-5.1 has a 400K token context window compared to Seed 2.0 Lite's 262K. On pricing, GPT-5.1 costs $1.25/M input tokens vs $0.25/M for Seed 2.0 Lite.

Our Verdict
GPT-5.1
GPT-5.1
Seed 2.0 Lite
Seed 2.0 LiteRunner-up

No community votes yet. On paper, GPT-5.1 has the edge — bigger model tier, bigger context window, major provider backing.

Seed 2.0 Lite is 5.0x cheaper per token — worth considering if cost matters.

Too close to call
FAQ

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