Free Models Router is free for input tokens while Seed 1.6 costs $0.25 per 1M tokens.
API cost decision in 10 seconds
Free Models Router vs Seed 1.6
Pick Free Models Router for lower cost; pick Seed 1.6 only if the larger context window matters more.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Free Models Router for lower cost; pick Seed 1.6 only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $1.25 for Seed 1.6, saving $1.25 (100% lower).
Cost-first pickFree Models Router
Context-first pickSeed 1.6
Sample savings$1.25100%
10x traffic gap$12.5
Seed 1.6 has more context, but Free Models Router saves $1.25 on the standard workload. At 10x that traffic, the same price gap is about $12.5. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Free Models Router stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Free Models Router | Seed 1.6 |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Free Models Router | $0 | $2.25 |
| Balanced workload | 1M input + 1M output | Free Models Router | $0 | $2.25 |
| Output-heavy chatbot | 1M input + 5M output | Free Models Router | $0 | $10.25 |
Free Models Router is free for output tokens while Seed 1.6 costs $2 per 1M tokens.
Seed 1.6 has 62.14K more context (1.31x larger).
Free Models Router is free for the standard workload while the other model is estimated at $1.25.
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Free Models Router has the lower input price; Free Models Router has the lower output price; Seed 1.6 offers the larger context window. For the 1M input plus 500K output sample, Free Models Router is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Free Models Router and $1.25 for Seed 1.6.
Choose Free Models Router when you care most about lower input-token price, and lower output-token price.
Choose Seed 1.6 when you care most about larger context window.
- On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $1.25 for Seed 1.6, saving $1.25 (100% lower).
- Free Models Router is free for the standard workload while the other model is estimated at $1.25.
- Free Models Router is free for input tokens while Seed 1.6 costs $0.25 per 1M tokens.
- Free Models Router is free for output tokens while Seed 1.6 costs $2 per 1M tokens.
- Seed 1.6 has 62.14K more context (1.31x larger).
| Feature | Free Models Router (OpenRouter) | Seed 1.6 (ByteDance Seed) |
|---|---|---|
| Input Price prompt tokens per 1M | $0 | $0.25 |
| Completion Price per 1M tokens | $0 | $2 |
| Sample Workload Cost 1M input + 500K output | $0 | $1.25 |
| Context Window | 200K | 262.14K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Free Models Router | On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $1.25 for Seed 1.6, saving $1.25 (100% lower). |
| High-volume input processing | Free Models Router | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Free Models Router | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Seed 1.6 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Seed 1.6 Flash can replace Seed 1.6 when lower sample workload cost matters most: $0.22.
- Seed-2.0-Mini can replace Seed 1.6 when lower sample workload cost matters most: $0.3.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Owl Alpha offers 1.05M context with $0 sample workload cost.
- Gemini 3.1 Flash Lite offers 1.05M context with $1 sample workload cost.
- DeepSeek V4 Pro offers 1.05M context with $0.87 sample workload cost.
- No popular competitor is currently available.
Cheaper alternatives
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Seed 1.6 is a general-purpose model released by the ByteDance Seed team. It incorporates multimodal capabilities and adaptive deep thinking with a 256K context window.