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ByteDance Seed · Released Aug 20, 2025

Seed-OSS-36B-Instruct

Open ByteDance Seed model for long-context reasoning, tool use, and agents.

  • Open weights
  • Reasoning
  • Tool calling
Capability
—No ECI score yet
Input
—No listed price
Output
—No listed price
Context
524K524K max output
Pricing

What it costs

No per-token price is published for this model yet.

No per-token price is listed for this model on models.dev.

Capability

Independent benchmarks

Epoch AI has not published a Capabilities Index score for Seed-OSS-36B-Instruct yet.

  • GPQA DiamondGraduate-level science questions71.5%
  • OTIS Mock AIME 2024–2025Competition mathematics67.5%

Scores from Epoch AI, run independently of ByteDance Seed.

Specifications

The details

Lab
ByteDance Seed
Released
Aug 20, 2025
Knowledge cutoff
Jul 2024
Context window
524,288 tokens
Max output
524,288 tokens
Inputs
Text
Output
Text
Reasoning
Always on
Tool calling
Yes
Structured output
No
Same lab

More from ByteDance Seed

Questions

About Seed-OSS-36B-Instruct

How much does Seed-OSS-36B-Instruct cost?

Seed-OSS-36B-Instruct has no published per-token API price on models.dev yet.

What is the context window of Seed-OSS-36B-Instruct?

Seed-OSS-36B-Instruct accepts up to 524,288 tokens per request and can write up to 524,288 tokens in one response.

How good is Seed-OSS-36B-Instruct?

Epoch AI has not published a Capabilities Index score for Seed-OSS-36B-Instruct yet. Epoch AI benchmark results: GPQA Diamond 71.5%, OTIS Mock AIME 2024–2025 67.5%.

Is Seed-OSS-36B-Instruct open source?

Yes. ByteDance Seed publishes the weights under the Apache 2.0 licence, so it can be downloaded and self-hosted.

What inputs does Seed-OSS-36B-Instruct support?

Seed-OSS-36B-Instruct accepts text and replies in text. It is a reasoning model, supports tool calling.

When was Seed-OSS-36B-Instruct released?

ByteDance Seed released Seed-OSS-36B-Instruct on Aug 20, 2025. Its training data runs to Jul 2024.

What are the best alternatives to Seed-OSS-36B-Instruct?

The closest current models from other labs on capability, price and release date are Claude Haiku 4.5 (Anthropic, ECI 142.2, $1.00 / $5.00), GPT-5 Nano (OpenAI, ECI 139.3, $0.05 / $0.40), DeepSeek-R1 (DeepSeek, ECI 138.8, $0.70 / $4.88) and Gemma 4 26B A4B IT (Google, ECI 142.0, $0.112 / $0.40).