Inception Mercury 2 (OpenRouter) vs Llama 4 Scout (Fireworks): API Cost Comparison
Compare the API pricing, context windows, features, and real-world cost projections for Inception Mercury 2 (OpenRouter) (OpenRouter) and Llama 4 Scout (Fireworks) (Fireworks AI). Use the interactive calculator below to compute your exact monthly cost based on your token usage and request volume.
Prices verified Mar 10, 2026
Interactive Cost Calculator
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Showing costs for 2 models. Cheapest: Llama 4 Scout (Fireworks) at $3.00/month.
| Alert | |||||||
|---|---|---|---|---|---|---|---|
BestLlama 4 Scout (Fireworks) | Fireworks AI | $3.00 | $0.000300 | $2.00 | $1.00 | 52.0% | Alerts coming soon |
Inception Mercury 2 (OpenRouter) | OpenRouter | $6.25 | $0.000625 | $2.50 | $3.75 | — | Alerts coming soon |
Monthly Cost Comparison
Price Comparison at a Glance
All prices are in USD per 1 million tokens ($/M tokens). Lower is cheaper.
| Pricing Type | Inception Mercury 2 (OpenRouter) | Llama 4 Scout (Fireworks) | Cheaper |
|---|---|---|---|
| Input (standard) | $0.25/M | $0.20/M | Llama 4 Scout (Fireworks) |
| Output | $0.75/M | $0.20/M | Llama 4 Scout (Fireworks) |
| Cached input | N/A | $0.10/M | — |
| Batch input | N/A | $0.10/M | — |
| Batch output | N/A | $0.10/M | — |
Prices last verified: 2026-03-10
Cost Breakdown by Usage Volume
Estimated monthly costs at different request volumes, assuming 1,000 input tokens and 500 output tokens per request. Adjust in the calculator above for your specific use case.
| Volume | Inception Mercury 2 (OpenRouter)Monthly | Llama 4 Scout (Fireworks)Monthly | Inception Mercury 2 (OpenRouter)Per request | Llama 4 Scout (Fireworks)Per request |
|---|---|---|---|---|
| 1K requests/mo | $0.62 | $0.30 | $0.000625 | $0.000300 |
| 10K requests/mo | $6.25 | $3.00 | $0.000625 | $0.000300 |
| 100K requests/mo | $62.50 | $30.00 | $0.000625 | $0.000300 |
| 1M requests/mo | $625.00 | $300.00 | $0.000625 | $0.000300 |
Green values indicate the lower-cost option at each volume tier. Cost per request is calculated at 1,000 input + 500 output tokens using standard (non-batch, non-cached) pricing.
Price History
Input price per 1M tokensWhen to Choose Inception Mercury 2 (OpenRouter)
by OpenRouter
- Document summarization
- General chatbot
Input / 1M tokens
$0.25/M
Output / 1M tokens
$0.75/M
Context window
128,000
Tier
budget
When to Choose Llama 4 Scout (Fireworks)
by Fireworks AI
- Customer support
- RAG / Semantic search
- General chatbot
Input / 1M tokens
$0.20/M
Output / 1M tokens
$0.20/M
Context window
10,000,000
Tier
budget
Key Differences Beyond Price
Cost is only one factor in choosing an AI model. Context window size, rate limits, supported features, and latency all affect whether a model fits your use case.
| Capability | Inception Mercury 2 (OpenRouter) | Llama 4 Scout (Fireworks) |
|---|---|---|
| Context window | 128,000 tokens | 10,000,000 tokens |
| Max output tokens | 50,000 tokens | 16,384 tokens |
| Performance tier | Budget | Budget |
| Vision / image input | No | Yes |
| Function calling | No | Yes |
| JSON mode | No | Yes |
| Prompt caching | No | Yes |
| Batch API (50% discount) | No | Yes |
| Extended reasoning | No | No |
| Fine-tuning | No | No |
Inception Mercury 2 (OpenRouter) notes
OpenRouter offers 200+ models — showing top 15 unique models not available from other listed providers. Prices include OpenRouter markup.
Llama 4 Scout (Fireworks) notes
Fireworks serverless pricing. Cached input 50% discount. Batch inference at 50% of serverless rates. 10M context window.
Frequently Asked Questions
Is Inception Mercury 2 (OpenRouter) cheaper than Llama 4 Scout (Fireworks)?
At standard usage (1,000 input tokens, 500 output tokens, 100,000 requests/month), Llama 4 Scout (Fireworks) costs $30.00/month versus $62.50/month for Inception Mercury 2 (OpenRouter) — a 52% saving. Your actual savings will vary based on your token profile; output-heavy workloads amplify differences in output pricing.
Which model has a larger context window, Inception Mercury 2 (OpenRouter) or Llama 4 Scout (Fireworks)?
Llama 4 Scout (Fireworks) has a larger context window at 10,000,000 tokens, compared to 128,000 tokens for Inception Mercury 2 (OpenRouter). A larger context window is important for processing long documents, multi-turn conversations, or large codebases without truncation.
Do Inception Mercury 2 (OpenRouter) and Llama 4 Scout (Fireworks) support the Batch API?
Llama 4 Scout (Fireworks) supports the Batch API (50% discount for async processing), while Inception Mercury 2 (OpenRouter) does not. If your workload tolerates up to 24-hour latency, routing to Llama 4 Scout (Fireworks) with batch pricing could significantly cut costs versus Inception Mercury 2 (OpenRouter)'s standard rate.
Which model offers better prompt caching?
Llama 4 Scout (Fireworks) supports prompt caching at $0.10/M for cached input, while Inception Mercury 2 (OpenRouter) does not offer prompt caching. For RAG applications or chatbots with large, repeated context, Llama 4 Scout (Fireworks)'s caching capability can substantially reduce effective costs.
What are the best use cases for Inception Mercury 2 (OpenRouter) vs Llama 4 Scout (Fireworks)?
Both models are well-suited for General chatbot. Inception Mercury 2 (OpenRouter) is particularly strong for Document summarization. Llama 4 Scout (Fireworks) is favored for Customer support, RAG / Semantic search. At the same quality level, the lower-cost model is usually preferable; use this page's calculator to compare total monthly spend at your volume.
What is the cost per request for Inception Mercury 2 (OpenRouter) vs Llama 4 Scout (Fireworks)?
At 1,000 input tokens and 500 output tokens per request — a typical conversational workload — Inception Mercury 2 (OpenRouter) costs $0.000625 per request and Llama 4 Scout (Fireworks) costs $0.000300 per request. At 100,000 requests/month, that translates to $62.50 and $30.00 respectively. Use the interactive calculator to adjust these parameters for your actual workload.
Inception Mercury 2 (OpenRouter) vs Llama 4 Scout (Fireworks): Summary
When comparing Inception Mercury 2 (OpenRouter) and Llama 4 Scout (Fireworks) for API cost, the right choice depends on your workload's token profile, required features, and tolerance for latency. Llama 4 Scout (Fireworks) offers lower total cost at standard usage volumes (1,000 input + 500 output tokens per request at 100,000 requests/month) at $30.00/month, compared to $62.50/month for Inception Mercury 2 (OpenRouter).
Both models are priced in USD per million tokens, the standard unit across all major AI API providers. Inception Mercury 2 (OpenRouter) charges $0.25/M for input tokens and $0.75/M for output tokens. Llama 4 Scout (Fireworks) charges $0.20/M input and $0.20/M output. If your workload is output-heavy (more tokens generated than consumed as input), the model with the lower output price compounds cost savings significantly at scale.
Prompt caching is supported by Llama 4 Scout (Fireworks) but not Inception Mercury 2 (OpenRouter). For workloads with large, repeated system prompts or document context — such as RAG pipelines or multi-turn conversations with a fixed knowledge base — prompt caching can reduce effective input costs by 60–90%, which may change the cost ranking between these two models at your specific usage pattern.
Context window capacity differs between the two: Llama 4 Scout (Fireworks) supports up to 10,000,000 tokens in a single request, versus 128,000 tokens for Inception Mercury 2 (OpenRouter). A larger context window is essential for document summarization, large codebase analysis, and multi-document retrieval-augmented generation (RAG) applications.
Use the interactive calculator at the top of this page to enter your actual token usage and monthly request volume for a precise cost comparison tailored to your workload. Adjust for batch API discounts and prompt caching to find the most cost-effective option for your specific deployment.
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Relevant Use Cases
See cost recommendations for workloads where Inception Mercury 2 (OpenRouter) or Llama 4 Scout (Fireworks) is recommended.