Gemini 2.5 Pro vs Gemini 3.1 Pro
Benchmark Performance
Available Benchmarks
| Benchmark | Gemini 2.5 Pro | Gemini 3.1 Pro |
|---|---|---|
| LMArena Document Arenadocument-2026-07-30-011508720696 · arena_rating · leader | 1,420.8798% of row best · rating · gemini-2.5-pro; 95% CI [1414.58328718, 1427.16017237]; votes 24963; rank 31 | 1,445.32100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1439.35538449, 1451.29339146]; votes 45162; rank 23 |
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · leader | 1,141.6594% of row best · rating · gemini-2.5-pro-grounding; 95% CI [1137.05776179, 1146.24105969]; votes 83404; rank 27 | 1,210.46100% of row best · rating · gemini-3.1-pro-grounding; 95% CI [1205.32063396, 1215.60669852]; votes 113282; rank 9 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,457.8298% of row best · rating · gemini-2.5-pro; 95% CI [1455.34940240, 1460.28624287]; votes 122575; rank 33 | 1,480.10100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1476.89767236, 1483.30025658]; votes 102763; rank 11 |
| LMArena Vision Arenavision-2026-08-27-011508720696 · arena_rating · leader | 1,262.4297% of row best · rating · gemini-2.5-pro; 95% CI [1257.72056767, 1267.11330698]; votes 87719; rank 41 | 1,295.39100% of row best · rating · gemini-3.1-pro-preview; 95% CI [1289.75236576, 1301.03738662]; votes 39412; rank 17 |
| ToneBench2026-08-14-10-task · overall_score · leader | 78.6398% of row best · points · Gemini 2.5 Pro · 4,636 output tokens / case | 80.00100% of row best · points · Gemini 3.1 Pro (high thinking) · 8,095 output tokens / case |
| Overall ResultCounted from the protocol-matched rows above | 0 benchmark wins | 5 benchmark winsOverall lead |
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 2.5 Pro | Gemini 3.1 Pro |
|---|---|---|
| Developer | Google DeepMind | Google DeepMind |
| Family | Gemini 2 5 | Gemini 3 |
| Model | Gemini 2.5 Pro | Gemini 3.1 Pro |
| Version | Gemini 2.5 Pro | Gemini 3.1 Pro |
| Lifecycle | active | preview |
| Released | Unknown | Unknown |
| Knowledge cutoff | 2025-01-01 | Unknown |
| Input modalities | Text, Image, Video, Audio, Document | Text, Image, Video, Audio, Document |
| Output modalities | Text | Text |
| Context window | 1,048,576 | 1,048,576 |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Google AI (Standard) | Google AI (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, generation, reasoning, tools |
13 comparable fields · 4 material differences · Pair passes the primary-source comparison gate
Gemini 2.5 Pro Capabilities
Gemini 3.1 Pro Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Primary Evidence
Sources and Freshness
Questions
Gemini 2.5 Pro vs Gemini 3.1 Pro FAQs
Is Gemini 2.5 Pro or Gemini 3.1 Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Gemini 2.5 Pro and Gemini 3.1 Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Gemini 2.5 Pro or Gemini 3.1 Pro?+
Gemini 2.5 Pro is $1.25 and Gemini 3.1 Pro is $2.00 per million tokens, so Gemini 2.5 Pro is cheaper on this metric. Gemini 2.5 Pro is $10.00 and Gemini 3.1 Pro is $12.00 per million tokens, so Gemini 2.5 Pro is cheaper on this metric.
Which has a larger context window, Gemini 2.5 Pro or Gemini 3.1 Pro?+
Neither model has a larger sourced context window in this comparison. Gemini 2.5 Pro is 1,048,576 and Gemini 3.1 Pro is 1,048,576.
Which performs better in benchmarks, Gemini 2.5 Pro or Gemini 3.1 Pro?+
Gemini 3.1 Pro leads the current overall benchmark count. The result uses 5 protocol-matched benchmarks from 2 publishers; it is not a universal quality score.
Can Gemini 2.5 Pro or Gemini 3.1 Pro be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Gemini 2.5 Pro is not marked open weight; Gemini 3.1 Pro is not marked open weight.
Can Gemini 2.5 Pro and Gemini 3.1 Pro understand images?+
Gemini 2.5 Pro is documented with image input; Gemini 3.1 Pro is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Gemini 2.5 Pro or Gemini 3.1 Pro?+
Neither has a larger sourced maximum output. Gemini 2.5 Pro is 65,536 and Gemini 3.1 Pro is 65,536.
Do Gemini 2.5 Pro and Gemini 3.1 Pro support reasoning and tool use?+
Gemini 2.5 Pro: reasoning, tool calling, and image input. Gemini 3.1 Pro: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Gemini 2.5 Pro or Gemini 3.1 Pro?+
Gemini 2.5 Pro has 1 sourced provider route; Gemini 3.1 Pro has 1, a tie.
Which offers better value, Gemini 2.5 Pro or Gemini 3.1 Pro?+
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.