What Mercury 3 is
Mercury 3 is an Inception model that went live on OpenRouter on October 16, 2026. It follows Mercury 2.5. Per standard answer it costs 2.4 times more, $0.0003 against $0.0001, and its context window is 1M tokens against 260K.
| Released | October 16, 2026 |
| Provider | Inception |
| Context window | 1M tokens |
| Input, per million tokens | $0.1 |
| Output, per million tokens | $0.35 |
| Credits per message in Whizi | 1 |
| Minimum Whizi plan | Powerhouse |
How to try Mercury 3 in Whizi
Whizi puts Mercury 3 in the same model picker as ChatGPT, Claude and Gemini, so there is no separate Inception account or API key to set up. Pick a plan on the pricing page, open a new chat, choose Mercury 3 in the model picker and send your first message.
Each message costs 1 credit, whatever its length. If a question turns out to suit another model better, switch in the same conversation and the thread carries across. See switching models mid-conversation.
What Mercury 3 costs
List rates are what the provider charges per token. The cost of one standard answer is the more useful number, because it prices the same unit of work across every model regardless of how each one is billed.
| Input, per million tokens | $0.1 |
| Output, per million tokens | $0.35 |
| One standard answer | $0.0003 |
| One thousand answers | $0.2750 |
| Context window | 1M tokens |
| Credits per message in Whizi | 1 |
| Minimum Whizi plan | Powerhouse |
| Rank by cost, of 124 priced models | 15 |
Prices are the published Inception rates as carried by OpenRouter, last refreshed 2026-10-20. The full dataset covering all 135 models from 34 providers is the AI model cost index, which is free to reuse with attribution.
What it costs inside Whizi
Whizi meters messages in credits rather than tokens, and Mercury 3 is charged at 1 credit per message. The cost does not change with the length of your message or the length of the answer, so a one line question and a long document analysis cost the same.
| Plan | Price per month | Monthly credits | Messages on this model |
|---|---|---|---|
| Powerhouse | $49.99, or $34.99 billed yearly | 10,000 | 10,000 |
Mercury 3 is part of the Powerhouse catalogue. Anything not explicitly listed on the Starter or Pro tiers resolves to Powerhouse, which is the deliberate default for the frontier and specialist models. See plans and limits.
- Input $0.1 and output $0.35 per million tokens
- $0.0003 for one standard answer, $0.2750 for a thousand
- 1M token context window
- 1 credit per message inside Whizi
- Requires the Powerhouse plan or above
- Ranks 15 of 124 priced models by cost per answer
Frequently asked questions
What is Mercury 3?
Mercury 3 is an Inception model released on October 16, 2026, with a 1M token context window. It follows Mercury 2.5. Per standard answer it costs 2.4 times more, $0.0003 against $0.0001, and its context window is 1M tokens against 260K.
How do I use Mercury 3?
Sign up for Whizi, open a new chat and choose Mercury 3 in the model picker. It is available on the Powerhouse plan and above at 1 credit per message, with no Inception account or API key needed.
How much does Mercury 3 cost?
$0.1 per million input tokens and $0.35 per million output tokens at list rates, which works out to $0.0003 for one standard answer of 1,000 tokens in and 500 out, or $0.2750 for a thousand of them. Inside Whizi it is 1 credit per message on a monthly allowance, rather than metered per token.
Which Whizi plan includes Mercury 3?
Powerhouse and above, which is $49.99 per month or $34.99 billed yearly. At 1 credits per message, a Powerhouse allowance of 10,000 credits covers 10,000 messages on this model if you spend the whole allowance here, and most people mix in a 1 credit model for routine work so it goes further.
