Seed1.8

Closed Deprecated Multimodal seed-1-8

Generalized agentic model combining search, coding and GUI-agent abilities with image input.

Released
Dec 18, 2025
Context window
262K tokens
Max output
65.5K tokens
Parameters
Not disclosed
Input price
$0.25 per 1M
Output price
$2.00 per 1M

Prices are first-party list prices in USD at the standard tier. Last verified Oct 30, 2026.

Pricing

Launch priceJan 1, 2026
$0.25 in / $2.00 out
Current price since Jan 1, 2026
$0.25 in / $2.00 out
Cached input $0.05 per 1M

Specifications

Developer
ByteDance
Model type
Multimodal
Architecture
Not disclosed
Parameters
Not disclosed
Input
Text Image
Output
Text
Knowledge cutoff
Not disclosed
License
Proprietary
API access
First-party API
End of life
Nov 11, 2026
Capabilities
Agentic Long context Reasoning Tool use Vision