GPT-6 Astra Pro Paid vs 
Gemini 3.1 Pro Preview Paid
GPT-6 Astra Pro vs Gemini 3.1 Pro Preview compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
GPT-6 Astra Pro — full profile › · Gemini 3.1 Pro Preview — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$50 /M outputManaged API (no infra to run)
$12 /M outputManaged API (no infra to run)
GPT-6 Astra Pro vs Gemini 3.1 Pro Preview specs
| Spec | GPT-6 Astra Pro | Gemini 3.1 Pro Preview | Winner |
|---|---|---|---|
| Maker | OpenAI | – | |
| Type | Proprietary | Proprietary | – |
| Context window | 1.1M tokens | 1M tokens | |
| Input price | $10/M | $2/M | |
| Output price | $50/M | $12/M | |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Gemini 3.1 Pro Preview is ~4.2× cheaper than GPT-6 Astra Pro on output tokens ($12 vs $50 per M tokens).
- You want frontier performance through a managed API
- You need the longer 1.1M 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 | GPT-6 Astra Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✓ |
Benchmarks: GPT-6 Astra Pro 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-6 Astra Pro and Gemini 3.1 Pro Preview score
| Criterion | GPT-6 Astra Pro | Gemini 3.1 Pro Preview |
|---|---|---|
| Cost-efficiency | 2.0 | 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-6 Astra Pro Paid
GPT-6 Astra Pro is the same underlying model as [GPT-6 Astra](https://openrouter.ai/openai/gpt-6-astra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://develope
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-6 Astra Pro vs Gemini 3.1 Pro Preview — which is cheaper?
Gemini 3.1 Pro Preview is cheaper on output ($12/M vs $50/M).
Which has the larger context window?
GPT-6 Astra Pro offers the larger context window (1.1M tokens).
GPT-6 Astra Pro 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 $50/M). Choose GPT-6 Astra Pro if you need the larger 1.1M context window.
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