Aya Expanse vs Inception Mercury 2 (OpenRouter): API Cost Comparison
Compare the API pricing, context windows, features, and real-world cost projections for Aya Expanse (Cohere) and Inception Mercury 2 (OpenRouter) (OpenRouter). 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: Inception Mercury 2 (OpenRouter) at $6.25/month.
| Alert | |||||||
|---|---|---|---|---|---|---|---|
BestInception Mercury 2 (OpenRouter) | OpenRouter | $6.25 | $0.000625 | $2.50 | $3.75 | 50.0% | Alerts coming soon |
Aya Expanse | Cohere | $12.50 | $0.001250 | $5.00 | $7.50 | — | Alerts coming soon |
Monthly Cost Comparison
Price Comparison at a Glance
All prices are in USD per 1 million tokens ($/M tokens). Lower is cheaper.
| Pricing Type | Aya Expanse | Inception Mercury 2 (OpenRouter) | Cheaper |
|---|---|---|---|
| Input (standard) | $0.50/M | $0.25/M | Inception Mercury 2 (OpenRouter) |
| Output | $1.50/M | $0.75/M | Inception Mercury 2 (OpenRouter) |
Prices last verified: 2026-03-06 – 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 | Aya ExpanseMonthly | Inception Mercury 2 (OpenRouter)Monthly | Aya ExpansePer request | Inception Mercury 2 (OpenRouter)Per request |
|---|---|---|---|---|
| 1K requests/mo | $1.25 | $0.62 | $0.001250 | $0.000625 |
| 10K requests/mo | $12.50 | $6.25 | $0.001250 | $0.000625 |
| 100K requests/mo | $125.00 | $62.50 | $0.001250 | $0.000625 |
| 1M requests/mo | $1,250.00 | $625.00 | $0.001250 | $0.000625 |
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 Aya Expanse
by Cohere
- Content & copywriting
- General chatbot
- Customer support
Input / 1M tokens
$0.50/M
Output / 1M tokens
$1.50/M
Context window
128,000
Tier
mid
When 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
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 | Aya Expanse | Inception Mercury 2 (OpenRouter) |
|---|---|---|
| Context window | 128,000 tokens | 128,000 tokens |
| Max output tokens | 4,096 tokens | 50,000 tokens |
| Performance tier | Mid | Budget |
| Vision / image input | No | No |
| Function calling | No | No |
| JSON mode | Yes | No |
| Prompt caching | No | No |
| Batch API (50% discount) | No | No |
| Extended reasoning | No | No |
| Fine-tuning | No | No |
Aya Expanse notes
Multilingual model supporting 23 languages. Good for international content.
Inception Mercury 2 (OpenRouter) notes
OpenRouter offers 200+ models — showing top 15 unique models not available from other listed providers. Prices include OpenRouter markup.
Frequently Asked Questions
Is Aya Expanse cheaper than Inception Mercury 2 (OpenRouter)?
At standard usage (1,000 input tokens, 500 output tokens, 100,000 requests/month), Inception Mercury 2 (OpenRouter) costs $62.50/month versus $125.00/month for Aya Expanse — a 50% 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, Aya Expanse or Inception Mercury 2 (OpenRouter)?
Both Aya Expanse and Inception Mercury 2 (OpenRouter) have the same context window: 128,000 tokens.
Do Aya Expanse and Inception Mercury 2 (OpenRouter) support the Batch API?
Neither Aya Expanse nor Inception Mercury 2 (OpenRouter) currently supports a batch API with discounted pricing. For batch-eligible alternatives, consider models from OpenAI, Anthropic, or Google that include batch API support.
Which model offers better prompt caching?
Neither Aya Expanse nor Inception Mercury 2 (OpenRouter) currently supports prompt caching. For prompt-caching capable alternatives, consider Claude models from Anthropic or GPT-4o from OpenAI.
What are the best use cases for Aya Expanse vs Inception Mercury 2 (OpenRouter)?
Both models are well-suited for General chatbot. Aya Expanse is particularly strong for Content & copywriting, Customer support. Inception Mercury 2 (OpenRouter) is favored for Document summarization. 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 Aya Expanse vs Inception Mercury 2 (OpenRouter)?
At 1,000 input tokens and 500 output tokens per request — a typical conversational workload — Aya Expanse costs $0.001250 per request and Inception Mercury 2 (OpenRouter) costs $0.000625 per request. At 100,000 requests/month, that translates to $125.00 and $62.50 respectively. Use the interactive calculator to adjust these parameters for your actual workload.
Aya Expanse vs Inception Mercury 2 (OpenRouter): Summary
When comparing Aya Expanse and Inception Mercury 2 (OpenRouter) for API cost, the right choice depends on your workload's token profile, required features, and tolerance for latency. Inception Mercury 2 (OpenRouter) offers lower total cost at standard usage volumes (1,000 input + 500 output tokens per request at 100,000 requests/month) at $62.50/month, compared to $125.00/month for Aya Expanse.
Both models are priced in USD per million tokens, the standard unit across all major AI API providers. Aya Expanse charges $0.50/M for input tokens and $1.50/M for output tokens. Inception Mercury 2 (OpenRouter) charges $0.25/M input and $0.75/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.
Context window capacity differs between the two: Both models support 128,000 tokens per request. 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
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