Seed 1.8: Benchmarks, Pricing & Context Window
Seed 1.8 is a language model from Bytedance, released in February 2026, with multimodal input, a 256K-token context window, and pricing from $0.250/M input, $0.050/M cached input, $2.00/M output.
Optimized specifically for multimodal agent scenarios. It features enhanced agent capabilities, upgraded multimodal comprehension, and more flexible context management.
Seed 1.8 benchmarks
Capability tiers
Standing within each category, adjusted for leaderboard depth.
Real tasks performance
High-confidence performance for Seed 1.8 across real-world prompt categories. Only 95% intervals at most 4 points wide are shown.
Performance by conversation depth
How Seed 1.8 holds up as conversations get longer.
Quality Tracker
Seed 1.8 Performance Across Datasets
Scores sourced from the model's scorecard, paper, or official blog posts
llm-stats.com - Tue Sep 08 2026Seed 1.8 pricing
Providers
Seed 1.8 starts at $0.250 per million input tokens and $2.00 per million output tokens via DeepInfra. Reused prompt prefixes cost $0.0500 per million cached input tokens.
| Provider | Input $/M | Cached input $/M | Output $/M | Context in / out | TTFT p95 s | Output p5 c/s | Modalities in / out |
|---|---|---|---|---|---|---|---|
 DeepInfra | $0.250 | $0.0500 | $2.00 | 256.0K/256.0K | — | — | / |
Cached input is the discounted price for prompt tokens served from a provider cache. TTFT is time to first token. Output is characters per second; p5 is the sustained floor exceeded by 95% of observed requests.
Seed 1.8 context window
Input and output token limits for Seed 1.8, plus how it ranks on long-context understanding.
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Seed 1.8 latency
Seed 1.8 time to first token, sustained output throughput, and failed-request rate from live model usage over the trailing 7 days.
Seed 1.8 examples
Recent arena outputs from Seed 1.8, picked from the highest-ranked matchups.
Seed 1.8 license
Seed 1.8 is a proprietary model available under its provider's product and API terms.
- License
- Proprietary
- Hosted access
Proprietary license - usage restrictions apply
Seed 1.8 resources
Official sources for Seed 1.8: provider documentation, official playground.
Seed 1.8 vs other models
The most-compared alternatives to Seed 1.8 are GPT-5 High, GPT-5.1 Instant, o1. Open any pair side-by-side for benchmarks, pricing, context, and latency.
Models like Seed 1.8
Models ranked just above and below Seed 1.8 by LLM Stats score.
FAQ
Common questions about Seed 1.8.