Gemini 3.1 Pro vs GPT-6 Astra
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Gemini 3.1 Pro | GPT-6 Astra |
|---|---|---|
| CostLower is better · Published-token output estimate | #22 of 36$0.161 per LiveBench case | UnrankedNot in the 36-model eligible cohort |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Gemini 3.1 Pro | GPT-6 Astra |
|---|---|---|
| Developer | Google DeepMind | OpenAI |
| Family | Gemini 3 | Gpt 6 |
| Model | Gemini 3.1 Pro | GPT-6 Astra |
| Version | Gemini 3.1 Pro | GPT-6 Astra |
| Lifecycle | preview | active |
| Released | Unknown | 2026-09-03 |
| Knowledge cutoff | Unknown | 2026-04-30 |
| Input modalities | Text, Image, Video, Audio, Document | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,049K | 1,050K |
| 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) | Openai (Standard) |
| Capabilities | chat, generation, reasoning, tools | chat, computer-use, generation, reasoning, research, tools |
13 comparable fields · 9 material differences · Pair passes the primary-source comparison gate
Gemini 3.1 Pro Capabilities
GPT-6 Astra Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
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 DeepSeek-V4-ProDeepSeek | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
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Gemini 3.1 ProGoogle DeepMind | vs |  Kimi-K3Moonshot AI | cross-developer peerstext |
 MiniMax-M3MiniMax | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
Gemini 3.1 ProGoogle DeepMind | vs |  Mistral Large 3Mistral AI | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
Gemini 3.1 Pro vs GPT-6 Astra FAQs
Is Gemini 3.1 Pro or GPT-6 Astra better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Gemini 3.1 Pro and GPT-6 Astra, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Gemini 3.1 Pro or GPT-6 Astra?+
Gemini 3.1 Pro is $2.00 and GPT-6 Astra is $10.00 per million tokens, so Gemini 3.1 Pro is cheaper on this metric. Gemini 3.1 Pro is $12.00 and GPT-6 Astra is $50.00 per million tokens, so Gemini 3.1 Pro is cheaper on this metric.
Which has a larger context window, Gemini 3.1 Pro or GPT-6 Astra?+
GPT-6 Astra has the larger sourced context window. Gemini 3.1 Pro supports 1,049K and GPT-6 Astra supports 1,050K.
Which performs better in benchmarks, Gemini 3.1 Pro or GPT-6 Astra?+
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 GPT-6 Astra be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. Gemini 3.1 Pro is not marked open weight; GPT-6 Astra is not marked open weight.
Can Gemini 3.1 Pro and GPT-6 Astra understand images?+
Gemini 3.1 Pro is documented with image input; GPT-6 Astra is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Gemini 3.1 Pro or GPT-6 Astra?+
GPT-6 Astra has the larger sourced maximum output: Gemini 3.1 Pro supports 66K and GPT-6 Astra supports 128K output tokens.
Do Gemini 3.1 Pro and GPT-6 Astra support reasoning and tool use?+
Gemini 3.1 Pro: reasoning, tool calling, and image input. GPT-6 Astra: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, Gemini 3.1 Pro or GPT-6 Astra?+
Gemini 3.1 Pro has 2 sourced provider routes; GPT-6 Astra has 1, so Gemini 3.1 Pro has broader tracked availability.
Which offers better value, Gemini 3.1 Pro or GPT-6 Astra?+
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.