Inception: Mercury 2 API Pricing
Inception: Mercury 2 costs $0.250 per 1M input tokens and $0.750 per 1M output tokens (cache reads: $0.025). Context window: 128K. Prices verified 2026-10-21 · source
Alternatives to consider
92% cheaper with nearly identical quality (20.1 vs 10.8)
Cheapest inception model — 82% less per month
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Token economics
| Token type | Price | vs base input |
|---|---|---|
| Standard input | $0.250 | — |
| Cache read | $0.025 | −90% |
| Output | $0.750 | — |
Prompt caching stores repeated context server-side: reads cost far less, but writes carry a one-time premium.
Higher effort = deeper thinking = more reasoning tokens billed as output.
What would Inception: Mercury 2 cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $5.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $17.50 |
| RAG pipeline | 30,000 | 4,000 / 500 | $41.25 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $11.50 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Inception: Mercury 2
Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM). Instead of generating tokens sequentially, Mercury 2 produces and refines multiple tokens in parallel, achieving...
Compare Inception: Mercury 2 with
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- Mercury 2 vs OpenAI: GPT-5.6 Sol
Popular head-to-heads — see all on the comparisons index.
Frequently asked questions
How much does Inception: Mercury 2 cost?
Inception: Mercury 2 costs $0.250 per 1M input tokens and $0.750 per 1M output tokens; cached input tokens cost $0.025 per 1M. Verified 2026-10-21 — provider source.
What is the context window?
128K tokens, with up to 50K output tokens per response. That's roughly 160 pages of text in a single request.
Does it support prompt caching?
Yes — cached input is $0.025/1M, about 90% cheaper than standard input. Agents and RAG workloads with repeated context benefit most.
What's a cheaper alternative?
ScaleDown: Summarize saves about 93% on a typical workload with comparable quality.
Official resources
- Inception: Mercury 2 on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- Shred your current bill — paste a CSV and see if switching saves money.