GPT-6 Astra vs Grok 4.6
Why this pair: Current OpenAI and xAI frontier models
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | GPT-6 Astra | Grok 4.6 |
|---|---|---|
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #18 of 36$0.097 per LiveBench case |
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
| Benchmark | GPT-6 Astra | Grok 4.6 |
|---|---|---|
| ARC-AGI-1verified-v1-2aa739d957fc · verified_score · leader | 98.50100% of row best · percent · GPT-6 Astra (XHigh) | 87.5089% of row best · percent · Grok 4.6 (Medium) |
| ARC-AGI-2verified-v2-b5cb5ec6e8c7 · verified_score · leader | 95.00100% of row best · percent · GPT-6 Astra (Max) | 67.0871% of row best · percent · Grok 4.6 (XHigh) |
| Overall ResultCounted from the protocol-matched rows above | 2 benchmark winsOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | GPT-6 Astra | Grok 4.6 |
|---|---|---|
| Developer | OpenAI | xAI |
| Family | Gpt 6 | Grok 4 |
| Model | GPT-6 Astra | Grok 4.6 |
| Version | GPT-6 Astra | Grok 4.6 |
| Lifecycle | active | active |
| Released | 2026-09-03 | Unknown |
| Knowledge cutoff | 2026-04-30 | 2026-02-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Text | Text |
| Context window | 1,050K | 500K |
| 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) | Xai (Standard) |
| Capabilities | chat, computer-use, generation, reasoning, research, tools | chat, generation, reasoning, tools |
14 comparable fields · 8 material differences · Editorially curated pair passes the primary-source comparison gate
GPT-6 Astra Capabilities
Grok 4.6 Capabilities
Internal Comparison Graph
Related Comparisons
| A | Pair | B | Context |
|---|---|---|---|
GPT-5.6 SolOpenAI | vs | GPT-6 AstraOpenAI | family variantsimage, text |
GPT-6 AstraOpenAI | vs | Grok 4.5xAI | cross-developer peersimage, text |
Claude Fable 5.1Anthropic | vs | GPT-6 AstraOpenAI | cross-developer peersimage, text |
 Gemini 3.1 ProGoogle DeepMind | vs | GPT-6 AstraOpenAI | cross-developer peerstext |
 DeepSeek-V4-ProDeepSeek | vs | GPT-6 AstraOpenAI | cross-developer peerstext |
GPT-6 AstraOpenAI | vs |  Qwen3.8-MaxQwen | cross-developer peersimage, text |
 Kimi-K3Moonshot AI | vs | GPT-6 AstraOpenAI | cross-developer peersimage, text |
 MiniMax-M3MiniMax | vs | GPT-6 AstraOpenAI | cross-developer peersimage, text |
GPT-6 AstraOpenAI | vs |  GLM-5.3Z.ai | cross-developer peerstext |
GPT-6 AstraOpenAI | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs | GPT-6 AstraOpenAI | cross-developer peersimage, text |
 Mistral Large 3Mistral AI | vs | GPT-6 AstraOpenAI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
GPT-6 Astra vs Grok 4.6 FAQs
Is GPT-6 Astra or Grok 4.6 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GPT-6 Astra and Grok 4.6, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GPT-6 Astra or Grok 4.6?+
GPT-6 Astra is $10.00 and Grok 4.6 is $2.00 per million tokens, so Grok 4.6 is cheaper on this metric. GPT-6 Astra is $50.00 and Grok 4.6 is $6.00 per million tokens, so Grok 4.6 is cheaper on this metric.
Which has a larger context window, GPT-6 Astra or Grok 4.6?+
GPT-6 Astra has the larger sourced context window. GPT-6 Astra supports 1,050K and Grok 4.6 supports 500K.
Which performs better in benchmarks, GPT-6 Astra or Grok 4.6?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can GPT-6 Astra or Grok 4.6 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. GPT-6 Astra is not marked open weight; Grok 4.6 is not marked open weight.
Can GPT-6 Astra and Grok 4.6 understand images?+
GPT-6 Astra is documented with image input; Grok 4.6 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, GPT-6 Astra or Grok 4.6?+
Neither has a larger sourced maximum output. GPT-6 Astra is 128K and Grok 4.6 is —.
Do GPT-6 Astra and Grok 4.6 support reasoning and tool use?+
GPT-6 Astra: reasoning, tool calling, and image input. Grok 4.6: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, GPT-6 Astra or Grok 4.6?+
GPT-6 Astra has 1 sourced provider route; Grok 4.6 has 1, a tie.
Which offers better value, GPT-6 Astra or Grok 4.6?+
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.