Gemini 3.1 Pro Alternatives
What is the best alternative to Gemini 3.1 Pro?
The closest alternative to Gemini 3.1 Pro (Google, $4.50/M blended) is Gemini 3.6 Flash, from Google, a drop-in migration priced -25% relative to Gemini 3.1 Pro at blended (3:1) rates. The tradeoff: you'd give up context drops from 2,000,000 to 1,000,000 tokens.
The closest match to Gemini 3.1 Pro (Google, $4.50/M) is Gemini 3.6 Flash — a drop-in migration at -25% price. You'd give up: context drops from 2,000,000 to 1,000,000 tokens.
Ranked — top 8 alternatives
| # | Model | Provider | Effort | $/M (Δ%) | tok/s (Δ%) | Context | Parity | Closeness |
|---|---|---|---|---|---|---|---|---|
| 1 | Gemini 3.6 Flash | drop-in | $3.38 (-25%) | +107.3% | -1000K | 91% | 83 | |
| 2 | Gemini 3.5 Flash Lite | drop-in | $0.56 (-87.5%) | +194.5% | -1000K | 64% | 75 | |
| 3 | GPT-5.6 Luna | OpenAI | config | $0.45 (-90%) | +129.1% | -1600K | 64% | 70 |
| 4 | GPT-5.6 Terra | OpenAI | config | $4.50 (0%) | +41.8% | -1600K | 73% | 69 |
| 5 | GPT-OSS 120B (Cerebras) | Cerebras | config | $0.45 (-90%) | +4354.5% | -1869K | 27% | 65 |
| 6 | Qwen 3.8 30B | Groq | config | $1.20 (-73.3%) | +1154.5% | -1869K | 45% | 64 |
| 7 | GPT-OSS 20B | Groq | config | $0.13 (-97.1%) | +1936.4% | -1869K | 36% | 64 |
| 8 | GPT-OSS 120B | Groq | config | $0.26 (-94.2%) | +1318.2% | -1869K | 36% | 62 |
Top 3, in detail
Same provider — change the model string, nothing else.
You lose: Context drops from 2,000,000 to 1,000,000 tokens.
base_url: https://generativelanguage.googleapis.com/v1beta auth: API key (header or query param); OAuth/service-account on Vertex AI
base_url: https://generativelanguage.googleapis.com/v1beta auth: API key (header or query param); OAuth/service-account on Vertex AI sdk: @google/genai model: "gemini-3.6-flash"
Same provider — change the model string, nothing else.
You lose: Context drops from 2,000,000 to 1,000,000 tokens; Max output drops from 64,000 to 32,000 tokens; No audio input; No extended-thinking mode.
base_url: https://generativelanguage.googleapis.com/v1beta auth: API key (header or query param); OAuth/service-account on Vertex AI
base_url: https://generativelanguage.googleapis.com/v1beta auth: API key (header or query param); OAuth/service-account on Vertex AI sdk: @google/genai model: "gemini-3.5-flash-lite"
Keep the `openai` SDK; change `baseURL` and the API key.
You lose: Context drops from 2,000,000 to 400,000 tokens; No audio input; No extended-thinking mode; Loses the free tier.
base_url: https://generativelanguage.googleapis.com/v1beta auth: API key (header or query param); OAuth/service-account on Vertex AI
base_url: https://api.openai.com/v1 auth: Bearer API key sdk: openai model: "gpt-5.6-luna"
Or don't migrate at all
One base URL, one key, change the model string — every alternative above is already callable through All AI Ask.
curl https://allaiask.com/api/v1/chat \
-H "Authorization: Bearer $ALLAIASK_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "gemini-3.6-flash", "messages": [{"role": "user", "content": "Hello"}]}'Google gotchas when switching away
- Safety settings and grounding tools are configured per-request, not per-key.
Related
FAQ
What is the closest alternative to Gemini 3.1 Pro?
Gemini 3.6 Flash is the closest match: drop-in migration, -25% price, losing context drops from 2,000,000 to 1,000,000 tokens.
Can I switch off Gemini 3.1 Pro without changing my code?
Within Google, Gemini 3.6 Flash is a drop-in swap — same request shape, just change the model string.
What do I lose switching from Gemini 3.1 Pro?
Against the closest match, Gemini 3.6 Flash: Context drops from 2,000,000 to 1,000,000 tokens.
Prices and specs verified 2026-08-08.