Gemini 3.1 Pro vs Gemma 4 31B
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Gemini 3.1 Pro | Gemma 4 31B |
|---|---|---|
| CostLower is better · Published-token output estimate | #22 of 36$0.161 per LiveBench case | UnrankedNot in the 36-model eligible cohort |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | Gemini 3.1 Pro | Gemma 4 31B |
|---|---|---|
| LMArena Agent Arenaagent-2026-08-31-011508720696 · outcome_score · leader | -3.13100% of row best · score · Gemini 3.1 Pro Preview; 95% CI [-4.00806078, -2.24630473]; sessions 83248; observations 2709356; rank 40 | -22.3380% of row best · score · Gemma 4 31B; 95% CI [-25.65092528, -19.00692476]; sessions 56661; observations 703574; rank 56 |
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · leader | 1,445.32100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1439.35538449, 1451.29339146]; votes 45162; rank 23 | 1,423.7099% of row best · rating · gemma-4-31b; 95% CI [1415.51297276, 1431.88143488]; votes 10577; rank 29 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,480.10100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1476.89767236, 1483.30025658]; votes 102763; rank 11 | 1,441.8297% of row best · rating · gemma-4-31b; 95% CI [1434.27306811, 1449.35895578]; votes 5900; rank 60 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · leader | 1,295.39100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1289.75236576, 1301.03738662]; votes 39412; rank 17 | 1,275.9498% of row best · rating · gemma-4-31b; 95% CI [1269.53471972, 1282.35229256]; votes 34348; rank 31 |
| Overall ResultCounted from the protocol-matched rows above | 4 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | Gemini 3.1 Pro | Gemma 4 31B |
|---|---|---|
| Developer | Google DeepMind | Google DeepMind |
| Family | Gemini 3 | Gemma 4 |
| Model | Gemini 3.1 Pro | Gemma 4 31B |
| Version | Gemini 3.1 Pro | Gemma 4 31B |
| Lifecycle | preview | active |
| Released | Unknown | 2026-03-11 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image, Video, Audio, Document | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,049K | 262K |
| Total parameters | Unknown | 31B |
| Active parameters | Unknown | Unknown |
| License | Unknown | apache-2.0 |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Google AI (Standard), Google Gemini (Standard) | Cerebras (Standard), Deepinfra (Standard), Google Gemini (Standard), Openrouter (Standard), Together Ai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, structured_outputs, tools |
13 comparable fields · 10 material differences · Pair passes the primary-source comparison gate
Gemini 3.1 Pro Capabilities
Gemma 4 31B Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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 DeepSeek-V4-ProDeepSeek | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs | Grok 4.6xAI | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  Qwen3.8-MaxQwen | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  Kimi-K3Moonshot AI | cross-developer peerstext |
 MiniMax-M3MiniMax | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  Mistral Large 3Mistral AI | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
Gemini 3.1 Pro vs Gemma 4 31B FAQs
Is Gemini 3.1 Pro or Gemma 4 31B better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Gemini 3.1 Pro and Gemma 4 31B, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Gemini 3.1 Pro or Gemma 4 31B?+
Gemini 3.1 Pro is $2.00 and Gemma 4 31B is $0.090 per million tokens, so Gemma 4 31B is cheaper on this metric. Gemini 3.1 Pro is $12.00 and Gemma 4 31B is $0.34 per million tokens, so Gemma 4 31B is cheaper on this metric.
Which has a larger context window, Gemini 3.1 Pro or Gemma 4 31B?+
Gemini 3.1 Pro has the larger sourced context window. Gemini 3.1 Pro supports 1,049K and Gemma 4 31B supports 262K.
Which performs better in benchmarks, Gemini 3.1 Pro or Gemma 4 31B?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can Gemini 3.1 Pro or Gemma 4 31B be self-hosted?+
Gemma 4 31B is the only model in this pair currently marked as self-hostable. Gemini 3.1 Pro is not marked open weight; Gemma 4 31B is open weight.
Can Gemini 3.1 Pro and Gemma 4 31B understand images?+
Gemini 3.1 Pro is documented with image input; Gemma 4 31B is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Gemini 3.1 Pro or Gemma 4 31B?+
Neither has a larger sourced maximum output. Gemini 3.1 Pro is 66K and Gemma 4 31B is —.
Do Gemini 3.1 Pro and Gemma 4 31B support reasoning and tool use?+
Gemini 3.1 Pro: reasoning, tool calling, and image input. Gemma 4 31B: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Gemini 3.1 Pro or Gemma 4 31B?+
Gemini 3.1 Pro has 2 sourced provider routes; Gemma 4 31B has 5, so Gemma 4 31B has broader tracked availability.
Which offers better value, Gemini 3.1 Pro or Gemma 4 31B?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.