Gemini 3.1 Pro vs Sonar Reasoning Pro
At a Glance
| Compare |  Gemini 3.1 ProGoogle DeepMind |  Sonar Reasoning ProPerplexity |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | #9 of 4679.7 score · 3/3 sources · complete | UnrankedNot in the 46-model eligible cohort |
| CostLower is better · Published-token output estimate | #27 of 44$0.161 per LiveBench case | UnrankedNot in the 44-model eligible cohort |
| EfficiencyHigher is better · MM Efficiency v1.5 | #9 of 3859.2 score · 3/3 sources · complete | UnrankedNot in the 38-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $2.00Google AI ↗ · Aug 29, 2026 | $2.00Openrouter ↗ · Sep 22, 2026 |
| Output priceFrom · USD / 1M tokens | $12.00Google AI ↗ · Aug 29, 2026 | $8.00Openrouter ↗ · Sep 22, 2026 |
| Context windowMaximum documented tokens | 1,049K | 128K |
| Model facts checked | Aug 29, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | Gemini 3.1 Pro | Sonar Reasoning Pro |
|---|---|---|
| LMArena Search Arenasearch-2026-08-24-d25aabda0010 · arena_rating · leader | 1,210.46100% of row best · rating · gemini-3.1-pro-grounding; 95% CI [1205.32063396, 1215.60669852]; votes 113282; rank 9 | 1,138.6094% of row best · rating · ppl-sonar-reasoning-pro-high; 95% CI [1132.86119454, 1144.34164089]; votes 29055; rank 29 |
| Overall ResultCounted from the protocol-matched rows above | 1 benchmark winNo overall winner | 0 benchmark winsNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | Gemini 3.1 Pro | Sonar Reasoning Pro |
|---|---|---|
| Developer | Google DeepMind | Perplexity |
| Family | Gemini 3 | Sonar |
| Model | Gemini 3.1 Pro | Sonar Reasoning Pro |
| Version | Gemini 3.1 Pro | Sonar Reasoning Pro |
| Lifecycle | preview | active |
| Released | Unknown | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image, Video, Audio, Document | Text |
| Output modalities | Text | Text |
| Context window | 1,049K | 128K |
| 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 Gemini (Standard) | Openrouter (Standard), Perplexity (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, citations, reasoning, search |
Gemini 3.1 Pro Capabilities
Sonar Reasoning Pro Capabilities
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Primary Evidence
Sources and Freshness
Questions
Gemini 3.1 Pro vs Sonar Reasoning Pro FAQs
Is Gemini 3.1 Pro or Sonar Reasoning Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Gemini 3.1 Pro and Sonar Reasoning Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Gemini 3.1 Pro or Sonar Reasoning Pro?+
Gemini 3.1 Pro is $2.00 and Sonar Reasoning Pro is $2.00 per million tokens, so they are tied on this metric. Gemini 3.1 Pro is $12.00 and Sonar Reasoning Pro is $8.00 per million tokens, so Sonar Reasoning Pro is cheaper on this metric.
Which has a larger context window, Gemini 3.1 Pro or Sonar Reasoning Pro?+
Gemini 3.1 Pro has the larger sourced context window. Gemini 3.1 Pro supports 1,049K and Sonar Reasoning Pro supports 128K.
Which performs better in benchmarks, Gemini 3.1 Pro or Sonar Reasoning Pro?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Gemini 3.1 Pro or Sonar Reasoning Pro be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Gemini 3.1 Pro is not marked open weight; Sonar Reasoning Pro is not marked open weight.
Can Gemini 3.1 Pro and Sonar Reasoning Pro understand images?+
Gemini 3.1 Pro is documented with image input; Sonar Reasoning Pro is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Gemini 3.1 Pro or Sonar Reasoning Pro?+
Neither has a larger sourced maximum output. Gemini 3.1 Pro is 66K and Sonar Reasoning Pro is —.
Do Gemini 3.1 Pro and Sonar Reasoning Pro support reasoning and tool use?+
Gemini 3.1 Pro: reasoning, tool calling, and image input. Sonar Reasoning Pro: reasoning. Feature support does not establish relative quality.
Which is available from more inference providers, Gemini 3.1 Pro or Sonar Reasoning Pro?+
Gemini 3.1 Pro has 2 sourced provider routes; Sonar Reasoning Pro has 2, a tie.
Which offers better value, Gemini 3.1 Pro or Sonar Reasoning 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.