Google: Gemma 4 31B (free) API Pricing
Google: Gemma 4 31B (free) costs Free per 1M input tokens and Free per 1M output tokens. Context window: 262K. Prices verified 2026-10-21 · source
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High adoption means battle-tested weights, more fine-tunes/quants, and faster bug fixes. View on HuggingFace →
From our own daily snapshot archive — independent of provider announcements.
Intelligence measures reasoning/knowledge/coding benchmarks. A high score with a low blended price = value pick; check the value chart to see where this model lands.
Higher effort = deeper thinking = more reasoning tokens billed as output.
What would Google: Gemma 4 31B (free) cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $0.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $0.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $0.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $0.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Google: Gemma 4 31B (free)
Gemma 4 31B Instruct is Google DeepMind's 30.7B dense multimodal model supporting text and image input with text output. Features a 256K token context window, configurable thinking/reasoning mode, native function...
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Frequently asked questions
How much does Google: Gemma 4 31B (free) cost?
Google: Gemma 4 31B (free) costs Free per 1M input tokens and Free per 1M output tokens. Verified 2026-10-21 — provider source.
What is the context window?
262K tokens, with up to 33K output tokens per response. That's roughly 328 pages of text in a single request.
Does it support prompt caching?
Prompt-caching pricing is not published for this model via OpenRouter.
What's a cheaper alternative?
Check the value chart for models with similar intelligence at lower cost.
Official resources
- Google: Gemma 4 31B (free) on OpenRouter — live endpoint, pricing source of record.
- Artificial Analysis leaderboard → — independent intelligence and performance rankings.
- Gemini docs → — first-party model specifications and limits.
- LMArena leaderboard → — independent human-preference rankings.
- Shred your current bill — paste a CSV and see if switching saves money.