GPT-5.6 Sol Paid vs 
Gemini 3.1 Pro Preview Paid
GPT-5.6 Sol vs Gemini 3.1 Pro Preview compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT-5.6 Sol — full profile › · Gemini 3.1 Pro Preview — full profile ›
Prices & specs refreshed from live data · OpenSourceAI.tech
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
GPT-5.6 Sol vs Gemini 3.1 Pro Preview specs
| Spec | GPT-5.6 Sol | Gemini 3.1 Pro Preview |
|---|---|---|
| Maker | OpenAI | |
| Type | Proprietary | Proprietary |
| Context window | 1.1M tokens | 1M tokens |
| Input price | $5/M | $2/M |
| Output price | $30/M | $12/M |
| Vision / multimodal | Yes | Yes |
| Tool / function calling | Yes | Yes |
| Self-hostable | No (API only) | No (API only) |
| License | Proprietary | Proprietary |
Feature comparison
| Capability | GPT-5.6 Sol | Gemini 3.1 Pro Preview |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✓ |
Benchmarks: GPT-5.6 Sol vs Gemini 3.1 Pro Preview
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How GPT-5.6 Sol and Gemini 3.1 Pro Preview score
| Criterion | GPT-5.6 Sol | Gemini 3.1 Pro Preview |
|---|---|---|
| Cost-efficiency | 3.0 | 3.5 |
| Context window | 5.0 | 5.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 5.0 |
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
GPT-5.6 Sol Paid
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...
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.
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
GPT-5.6 Sol vs Gemini 3.1 Pro Preview — which is cheaper?
Gemini 3.1 Pro Preview is cheaper on output ($12/M vs $30/M).
Which has the larger context window?
GPT-5.6 Sol offers the larger context window (1.1M tokens).
GPT-5.6 Sol vs Gemini 3.1 Pro Preview — which should I pick in 2026?
Choose Gemini 3.1 Pro Preview for the lower output price ($12/M vs $30/M). Choose GPT-5.6 Sol if you need the larger 1.1M context window.
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