Pricing Guide
AI Credits
What AI credits pay for, how much each plan includes, and what Gemini 3.7 Flash and Gemini 3.1 Pro cost to run.
What AI credits are
AI credits are a hosted balance for reaching Gemini models directly from Nimrobo — no Gemini API key of your own required. They're separate from your ChatGPT Plus/Pro sign-in, which is what the harness uses by default; AI credits are what let you point an outcome loop at Gemini instead, or alongside it, metered by what you actually use.
A dollar of AI credits buys a dollar of Gemini usage at the rates below — there's no separate credit-to-dollar conversion to do the math on.
How much each plan includes
| Plan | AI credits |
|---|---|
| Free | $3, one-time |
| Starter | $3/mo |
| Plus | $15/mo |
See /pricing for the full plan comparison, including data-credits and outcome limits.
Gemini 3.7 Flash consumption pricing
Google's introductory pricing runs through December 31, 2026, then steps up to the standard rate.
| Token type | Through Dec 31, 2026 | From Jan 1, 2027 |
|---|---|---|
| Input, per 1M tokens | $0.75 | $1.50 |
| Output, per 1M tokens | $3.75 | $7.50 |
| Cached input, per 1M tokens | $0.075 | $0.15 |
Cached input also carries a separate storage charge of $0.50 per 1M tokens per hour the cache stays alive (doubling to $1.00 alongside the rest of standard pricing) — worth counting before caching pays for itself on a short-lived context.
Gemini 3.1 Pro consumption pricing
Pricing steps up once a single prompt crosses 200K tokens.
| Token type | Prompt ≤ 200K tokens | Prompt > 200K tokens |
|---|---|---|
| Input, per 1M tokens | $2.00 | $4.00 |
| Output, per 1M tokens | $12.00 | $18.00 |
| Cached input, per 1M tokens | $0.20 | Not published |
Cached input also carries a $0.50-per-1M-tokens-per-hour storage charge while the cache stays alive.
Rates are Google's published Gemini API prices as of August 2026 — see ai.google.dev/gemini-api/docs/pricing for the current numbers if they've moved since.
What that buys you
A real run mixes input and output tokens, so treat these as the two ends of the range rather than a number to expect exactly. At today's intro rate on Gemini 3.7 Flash, Starter's $3/mo is roughly 4M input tokens or 800K output tokens; Plus's $15/mo is roughly 20M input tokens or 4M output tokens. On Gemini 3.1 Pro, that same $3 is roughly 1.5M input tokens or 250K output tokens, and $15 is roughly 7.5M input tokens or 1.25M output tokens.