ByteDance · Text line

Seed

4 stages over 8 months, from Seed 1.6 in Oct 2025 to Seed 2.1 Turbo in Jun 2026.

Evolution chamber01 / 04

ByteDance

Seed 1.6

CTX256K

Reasoning · Tools

Input$0.12/M

Output$1.19/M

ByteDance Seed model for long-context reasoning, instruction following, and tool-assisted tasks

PaidProprietary678/1044

Ready to evolve

Every generation. A new possibility.

Seed 1.6 · Oct 2025

4 stages, from Seed 1.6 (Oct 2025) to Seed 2.1 Turbo (Jun 2026). Press Evolve to watch each step.

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Max output

Output priceper 1M tokens, lower is better

v1.6 Stage 1
ByteDance
Seed 1.6
CTX256K
Reasoning · Tools
TextInput$0.12/M
TextOutput$1.19/M
ByteDance Seed model for long-context reasoning, instruction following, and tool-assisted tasks
PaidProprietary678/1044
v1.8 Stage 2
ByteDance
Seed 1.8
CTX256K
Reasoning · Vision · Tools
TextImageInput$0.12/M
TextOutput$1.19/M
ByteDance Seed model for multimodal reasoning, long-context analysis, and agent workflows
PaidProprietary733/1044
v2.0 Stage 3
ByteDance
Seed 2.0 Code
CTX262K
Preview
Reasoning · Vision · Tools
TextImageVideoInput$0.47/M
TextOutput$2.37/M
ByteDance Seed coding model for multimodal software engineering and long-running agents
PaidProprietary780/1044
v2.1 Stage 4
ByteDance
Seed 2.1 Turbo
CTX256K
Reasoning · Vision · Tools
TextImageVideoInput$0.45/M
TextOutput$2.23/M
Faster ByteDance Seed 2.1 model for multimodal reasoning and latency-sensitive agent workflows
PaidProprietary930/1044