Free Models Router is free for input tokens while Mercury 2 costs $0.25 per 1M tokens.
API cost decision in 10 seconds
Mercury 2 vs Free Models Router
Pick Free Models Router when budget and context both matter.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Free Models Router when budget and context both matter.
On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $0.62 for Mercury 2, saving $0.62 (100% lower).
Cost-first pickFree Models Router
Context-first pickFree Models Router
Sample savings$0.62100%
10x traffic gap$6.25
Free Models Router is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $6.25. 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 | Mercury 2 | Free Models Router |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Free Models Router | $1.62 | $0 |
| Balanced workload | 1M input + 1M output | Free Models Router | $1 | $0 |
| Output-heavy chatbot | 1M input + 5M output | Free Models Router | $4 | $0 |
Free Models Router is free for output tokens while Mercury 2 costs $0.75 per 1M tokens.
Free Models Router has 72K more context (1.56x larger).
Free Models Router is free for the standard workload while the other model is estimated at $0.62.
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; Free Models Router 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 $0.62 for Mercury 2 and $0 for Free Models Router.
Choose Mercury 2 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
Choose Free Models Router when you care most about lower input-token price, lower output-token price, and larger context window.
- On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $0.62 for Mercury 2, saving $0.62 (100% lower).
- Free Models Router is free for the standard workload while the other model is estimated at $0.62.
- Free Models Router is free for input tokens while Mercury 2 costs $0.25 per 1M tokens.
- Free Models Router is free for output tokens while Mercury 2 costs $0.75 per 1M tokens.
- Free Models Router has 72K more context (1.56x larger).
| Feature | Mercury 2 (Inception) | Free Models Router (OpenRouter) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.25 | $0 |
| Completion Price per 1M tokens | $0.75 | $0 |
| Sample Workload Cost 1M input + 500K output | $0.62 | $0 |
| Context Window | 128K | 200K |
| 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 $0.62 for Mercury 2, saving $0.62 (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 | Free Models Router | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- No lower-cost same-provider swap is currently tracked for this pair.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Owl Alpha offers 1.05M context with $0 sample workload cost.
- DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
- Gemini 2.5 Flash Lite offers 1.05M context with $0.3 sample workload cost.
- DeepSeek V4 Flash · DeepSeek · #1
- Hy3 preview · Tencent · #2
- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
Cheaper alternatives
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