This comparison is usually framed as free versus paid, which makes it a question about the ceiling rather than the tools. Gemini CLI ships with a real included allowance; Claude Code defaults to a subscription. Both are terminal agents of broadly the same shape. So the question that actually decides it is the one none of the comparisons answer: what the bill looks like after the free quota, and after the usage window.
The shape of each
| Claude Code | Gemini CLI | |
|---|---|---|
| Made by | Anthropic | |
| Starts at | A Claude subscription, with a usage window | Free, with a daily quota |
| Default models | Claude | Gemini |
| Custom endpoint | ANTHROPIC_BASE_URL — Anthropic protocol | A key, and Google-shaped configuration |
| Runs out when | You hit the plan window | You hit the daily quota |
| Then what | Per-token billing on any compatible endpoint | Per-token billing on a key |
Both of the last two rows land in the same place, which is the thing worth noticing: this is a comparison of starting conditions, and everyone who uses either tool seriously ends up on the same per-token footing.
Why agent work reaches a quota fast
A chat turn sends one question. An agent step sends the task, the relevant files, the tool results and the history — every step, because the model is stateless. A loop that edits four files and runs the tests twice can therefore cost more than an afternoon of conversation. That is not a flaw in either tool; it is what agentic work is, and it is why a free allowance that feels generous in chat empties quickly here.
The consequence for this comparison: budget on the paid rate, and treat the free tier as a head start rather than the plan.
What both look like on per-token billing
# Claude Code — Anthropic-shaped endpoint, two variables.
export ANTHROPIC_BASE_URL=https://api.kunavo.com
export ANTHROPIC_AUTH_TOKEN=sk-kn-...
export ANTHROPIC_DEFAULT_HAIKU_MODEL=claude-haiku-4-5
# Gemini models past the free quota — OpenAI-compatible endpoint,
# which is what most tools and SDKs expect:
curl https://api.kunavo.com/v1/chat/completions \
-H "Authorization: Bearer sk-kn-..." \
-H "Content-Type: application/json" \
-d '{"model":"gemini-3-8-flash","messages":[{"role":"user","content":"hi"}]}'Full rates for each family, next to the vendors' own list prices, are on Gemini API pricing and Claude API pricing. The plan-versus-key arithmetic for the Claude side is on Claude Pro and Max limits.
Where this page stops
It does not rank the two on output quality. We have not run a controlled comparison on identical tasks, and the occupants of this query that do rank them are reporting impressions from their own use — worth reading, and not a measurement. If quality is your deciding factor, run the same real task in both on per-token billing and compare the diffs and the charges; that is an afternoon, and it is the only version of the answer that holds for your codebase.
If the free tier is what brought you here, the broader survey is on Claude Code alternatives, which separates “the tool is wrong” from “the bill is wrong” before recommending anything.
FAQ
Is Gemini CLI really free?
The included allowance is real and it is generous for light use, but it is a daily quota rather than an unlimited tier, and agentic work reaches it much faster than chat does — an agent re-sends context on every step of a loop, so a single long task can consume what a day of conversation would not. Treat it as a genuine free tier with a ceiling, not as a permanent answer to the cost question. Past the ceiling you are buying tokens, the same as everywhere else.
Which is better, Gemini CLI or Claude Code?
They are close enough in shape — both are terminal agents that read your repo, propose edits and run commands — that the honest differentiators are the lab behind the default model and how each is paid for. Gemini CLI starts free and is tied to Google's models; Claude Code starts on a subscription and is tied to the Anthropic API shape, though it accepts any endpoint that speaks it. We have not run a controlled comparison of their output and do not rank them on it.
What happens when the Gemini CLI free quota runs out?
You supply a key and pay per token, which is the same position a Claude Code user is in after the subscription's usage window. At that point the choice stops being free-versus-paid and becomes a straight rate comparison. On Kunavo, Gemini 3.8 Flash is $0.525 input / $2.625 output per 1M tokens and Gemini 3.1 Pro is $0.70 / $4.20; Claude Sonnet 4.6 is $1.20 / $6.00 and Claude Haiku 4.5 is $0.40 / $2.00. Those are the numbers the comparison is actually about once the free tier is behind you.
Can I use Gemini models inside Claude Code?
Not directly. Claude Code speaks the Anthropic Messages API, so whatever endpoint you give it has to answer in that shape — which is why its cheap tier (ANTHROPIC_DEFAULT_HAIKU_MODEL) is also a Claude model. If running models from several labs inside one agent is what you want, a provider-agnostic tool is the structural fit; opencode is the closest one to Claude Code in shape.
Can I run both?
Yes, and it is a reasonable setup: Gemini CLI for the work its free allowance covers, Claude Code for the runs where you want a Claude model, each billed its own way. Neither costs anything while idle if you are on per-token billing, so keeping both installed has no standing cost — the decision is per task rather than once and forever.
Which is cheaper past the free tier?
Per token, the Gemini flash tier is the cheapest option in this comparison, and the gap narrows as you move up to the pro tiers. But rate is only half of it: agent cost is rate multiplied by how much context the tool re-sends per step, and that varies with your repo more than with the tool. The reliable way to settle it is to run the same real task through both on per-token billing and compare the actual charges rather than the rate cards.