GPT-6 Astra vs o3-pro
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | GPT-6 Astra | o3-pro |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Family | Gpt 6 | O3 |
| Model | GPT-6 Astra | o3-pro |
| Version | GPT-6 Astra | o3-pro |
| Lifecycle | active | active |
| Released | 2026-09-03 | 2025-06-10 |
| Knowledge cutoff | 2026-04-30 | 2024-06-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,050K | 200K |
| 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 | Openai (Standard) | Openai (Standard), Openrouter (Standard) |
| Capabilities | chat, computer-use, generation, reasoning, research, tools | chat, generation, reasoning, structured_outputs, tools |
15 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
GPT-6 Astra Capabilities
o3-pro Capabilities
Internal Comparison Graph
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Primary Evidence
Sources and Freshness
Questions
GPT-6 Astra vs o3-pro FAQs
Is GPT-6 Astra or o3-pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GPT-6 Astra and o3-pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GPT-6 Astra or o3-pro?+
GPT-6 Astra is $10.00 and o3-pro is $20.00 per million tokens, so GPT-6 Astra is cheaper on this metric. GPT-6 Astra is $50.00 and o3-pro is $80.00 per million tokens, so GPT-6 Astra is cheaper on this metric.
Which has a larger context window, GPT-6 Astra or o3-pro?+
GPT-6 Astra has the larger sourced context window. GPT-6 Astra supports 1,050K and o3-pro supports 200K.
Which performs better in benchmarks, GPT-6 Astra or o3-pro?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can GPT-6 Astra or o3-pro be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. GPT-6 Astra is not marked open weight; o3-pro is not marked open weight.
Can GPT-6 Astra and o3-pro understand images?+
GPT-6 Astra is documented with image input; o3-pro is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GPT-6 Astra or o3-pro?+
GPT-6 Astra has the larger sourced maximum output: GPT-6 Astra supports 128K and o3-pro supports 100K output tokens.
Do GPT-6 Astra and o3-pro support reasoning and tool use?+
GPT-6 Astra: reasoning, tool calling, and image input. o3-pro: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, GPT-6 Astra or o3-pro?+
GPT-6 Astra has 1 sourced provider route; o3-pro has 2, so o3-pro has broader tracked availability.
Which offers better value, GPT-6 Astra or o3-pro?+
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.