# Gemini 3 Pro Deep Think vs GPT-6 Astra

> Side-by-side benchmark comparison for Gemini 3 Pro Deep Think and GPT-6 Astra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-pro-deep-think-vs-gpt-6-astra
- Last updated: October 17, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 3 Pro Deep Think and GPT-6 Astra share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Gemini 3 Pro Deep Think has the lower published output-token price.
- Gemini 3 Pro Deep Think has the larger published context window at 2M.

## Model Snapshot

| Property | Gemini 3 Pro Deep Think | GPT-6 Astra |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 1.05M |
| Independent public score (not head-to-head) | null | 83.88 |
| Benchmarks Covered | 1 | 40 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $10.00 / $50.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: Coming soon
- GPT-6 Astra public-lane score: 74.8 (Supported · #7/128)

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| BrowseComp | Coming soon | 91.5% | Coming soon |
| OSWorld 2.0 | Coming soon | 72.6% | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 57.90% | Coming soon |
| Terminal-Bench-Science 0.1 | Coming soon | 64.6% | Coming soon |
| ExploitGym | Coming soon | 42.4% | Coming soon |
| Agents' Last Exam | Coming soon | 59.3% | Coming soon |
| AutomationBench | Coming soon | 41.4% | Coming soon |
| HLE w/ tools | Coming soon | 57.2% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 87.3% | Coming soon |
| ApprenticeBench | Coming soon | 68% | Coming soon |
| CWE-bench v1 | Coming soon | 68.0% | Coming soon |
| Hermes Index | Coming soon | 56.3% | Coming soon |
| Hermes Bench | Coming soon | 73.7% | Coming soon |
| MazeBench | Coming soon | 23% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: Coming soon
- GPT-6 Astra public-lane score: 75.5 (Supported · #4/150)

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | Coming soon | 74.1% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 53.3% | Coming soon |
| FrontierCode 1.1 Extended | Coming soon | 64.5% | Coming soon |
| FrontierSWE v2 | Coming soon | 65.5% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 44.3% | Coming soon |
| Bug Hunt Bench | Coming soon | 45.0 fixes | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: 47.9 (Unranked · 1 rankable row)
- GPT-6 Astra public-lane score: 93.3 (#1/28)

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 45.1% | 95% | GPT-6 Astra |
| STEMBench | Coming soon | 2.81 | Coming soon |
| ARC-AGI-1 | Coming soon | 98.50% | Coming soon |
| ARC-AGI-3 | Coming soon | 62.7% | Coming soon |
| GeneBench-Pro | Coming soon | 37.8% | Coming soon |
| MRCR v2 256K-512K | Coming soon | 100.0% | Coming soon |
| MRCR v2 512K-1M | Coming soon | 96.3% | Coming soon |
| GraphWalks BFS 256K–1M | Coming soon | 71.8% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: Coming soon
- GPT-6 Astra public-lane score: 87.3 (Unranked · 3 rankable rows)

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| ScreenSpot Pro | Coming soon | 92.7% | Coming soon |
| BenchCAD Vision2Code (tools) | Coming soon | 0.959 | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: Coming soon
- GPT-6 Astra public-lane score: 86.2 (Supported · #3/184)

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 96% | Coming soon |
| GPQA-D | Coming soon | 96.0% | Coming soon |
| HealthBench (raw) | Coming soon | 56.9% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 58.3% | Coming soon |
| HealthBench Professional | Coming soon | 64.7% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 68.2% | Coming soon |
| HealthBench Hard | Coming soon | 36.6% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: Coming soon
- GPT-6 Astra public-lane score: Coming soon

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | Coming soon | 8.5% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 3 Pro Deep Think public-lane score: Coming soon
- GPT-6 Astra public-lane score: 97.3 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3 Pro Deep Think | GPT-6 Astra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tier 4) | Coming soon | 97.600% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 93.684% | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 3 Pro Deep Think and GPT-6 Astra?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Gemini 3 Pro Deep Think vs Gemini 3 Pro](/compare/gemini-3-pro-vs-gemini-3-pro-deep-think)
- [GPT-6 Astra vs Gemini 3 Pro](/compare/gemini-3-pro-vs-gpt-6-astra)
- [Gemini 3 Pro Deep Think vs GPT-6.1 Sol](/compare/gemini-3-pro-deep-think-vs-gpt-6-1-sol)
- [GPT-6 Astra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-astra)

## Explore More

- [Gemini 3 Pro Deep Think profile](/models/gemini-3-pro-deep-think)
- [GPT-6 Astra profile](/models/gpt-6-astra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)