Gemini 3.1 Pro Preview Paid vs 
Sonar Reasoning Pro Paid
Gemini 3.1 Pro Preview vs Sonar Reasoning Pro compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Gemini 3.1 Pro Preview — full profile › · Sonar Reasoning Pro — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$12 /M outputManaged API (no infra to run)
$8 /M outputManaged API (no infra to run)
Gemini 3.1 Pro Preview vs Sonar Reasoning Pro specs
| Spec | Gemini 3.1 Pro Preview | Sonar Reasoning Pro | Winner |
|---|---|---|---|
| Maker | Perplexity | – | |
| Type | Proprietary | Proprietary | – |
| Context window | 1M tokens | 128K tokens | |
| Input price | $2/M | $2/M | = Tie |
| Output price | $12/M | $8/M | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | No | |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Sonar Reasoning Pro is ~1.5× cheaper than Gemini 3.1 Pro Preview on output tokens ($8 vs $12 per M tokens).
- You want frontier performance through a managed API
- You need the longer 1M context window
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | Gemini 3.1 Pro Preview | Sonar Reasoning Pro |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✗ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: Gemini 3.1 Pro Preview vs Sonar Reasoning Pro
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Gemini 3.1 Pro Preview and Sonar Reasoning Pro score
| Criterion | Gemini 3.1 Pro Preview | Sonar Reasoning Pro |
|---|---|---|
| Cost-efficiency | 3.5 | 3.5 |
| Context window | 5.0 | 3.5 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 3.5 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Gemini 3.1 Pro Preview Paid
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation.
Sonar Reasoning Pro Paid
Note: Sonar Pro pricing includes Perplexity search pricing. See [details here](https://docs.perplexity.ai/guides/pricing#detailed-pricing-breakdown-for-sonar-reasoning-pro-and-sonar-pro) Sonar Reasoning Pro is a premier reasoning model powe
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Gemini 3.1 Pro Preview vs Sonar Reasoning Pro — which is cheaper?
Sonar Reasoning Pro is cheaper on output ($8/M vs $12/M).
Which has the larger context window?
Gemini 3.1 Pro Preview offers the larger context window (1M tokens).
Gemini 3.1 Pro Preview vs Sonar Reasoning Pro — which should I pick in 2026?
Choose Sonar Reasoning Pro for the lower output price ($8/M vs $12/M). Choose Gemini 3.1 Pro Preview if you need the larger 1M context window.
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