GPT-Image 2.5 Sunburst vs Grok 4.6
At a Glance
| Compare |  GPT-Image 2.5 SunburstOpenAI | Grok 4.6xAI |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v2.5 | UnrankedNot in the 46-model eligible cohort | #21 of 4664.1 score · 3/3 sources · complete |
| CostLower is better · Published-token output estimate | UnrankedNot in the 44-model eligible cohort | #22 of 44$0.097 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.5 | UnrankedNot in the 38-model eligible cohort | #16 of 3856.7 score · 3/3 sources · complete |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | $5.00Openai ↗ · Sep 9, 2026 | $2.00Xai ↗ · Sep 3, 2026 |
| Output priceFrom · USD / 1M tokens | $30.00Openai ↗ · Sep 9, 2026 | $6.00Xai ↗ · Sep 3, 2026 |
| Context windowMaximum documented tokens | Not reported | 500K |
| Model facts checked | Sep 9, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | GPT-Image-2.5 Sunburst | Grok 4.6 |
|---|---|---|
| Developer | OpenAI | xAI |
| Family | Gpt Image 2 5 | Grok 4 |
| Model | GPT-Image-2.5 Sunburst | Grok 4.6 |
| Version | GPT-Image-2.5 Sunburst | Grok 4.6 |
| Lifecycle | active | active |
| Released | 2026-09-08 | Unknown |
| Knowledge cutoff | Unknown | 2026-02-01 |
| Input modalities | Text, Image | Text, Image |
| Output modalities | Image | Text |
| Context window | Unknown | 500K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | Unknown | No |
| API available | Yes | Yes |
| Self-hostable | Unknown | No |
| Provider access | Openai (Standard) | Xai (Standard) |
| Capabilities | image-editing, image-generation, inpainting | chat, generation, reasoning, tools |
| Default usage-tier rate limits | Tier 1: 100,000 TPM, 5 IPM, Tier 2: 250,000 TPM, 20 IPM, Tier 3: 800,000 TPM, 50 IPM, Tier 4: 3,000,000 TPM, 150 IPM, Tier 5: 8,000,000 TPM, 250 IPM | Unknown |
| Default snapshot | gpt-image-2.5-sunburst-2026-09-08 | Unknown |
| Model positioning | Most capable GPT Image model for editing precision | Unknown |
| Quality settings | low, medium, high, xhigh, max, auto | Unknown |
| Supported API routes | v1/images/generations, v1/images/edits | Unknown |
| Unsupported API routes | v1/assistants, v1/audio/speech, v1/audio/transcriptions, v1/audio/translations, v1/batch, v1/chat/completions, v1/completions, v1/embeddings, v1/fine-tuning, v1/moderations, v1/realtime, v1/realtime/transcription_sessions, v1/realtime/translations, v1/responses, v1/videos | Unknown |
GPT-Image 2.5 Sunburst Capabilities
Grok 4.6 Capabilities
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Primary Evidence
Sources and Freshness
Questions
GPT-Image 2.5 Sunburst vs Grok 4.6 FAQs
Is GPT-Image 2.5 Sunburst or Grok 4.6 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both GPT-Image 2.5 Sunburst and Grok 4.6, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, GPT-Image 2.5 Sunburst or Grok 4.6?+
GPT-Image 2.5 Sunburst is $5.00 and Grok 4.6 is $2.00 per million tokens, so Grok 4.6 is cheaper on this metric. GPT-Image 2.5 Sunburst is $30.00 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-Image 2.5 Sunburst or Grok 4.6?+
Neither model has a larger sourced context window in this comparison. GPT-Image 2.5 Sunburst is — and Grok 4.6 is 500K.
Which performs better in benchmarks, GPT-Image 2.5 Sunburst or Grok 4.6?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can GPT-Image 2.5 Sunburst or Grok 4.6 be self-hosted?+
Neither model is the only model in this pair currently marked as self-hostable. GPT-Image 2.5 Sunburst is of unknown open-weight status; Grok 4.6 is not marked open weight.
Can GPT-Image 2.5 Sunburst and Grok 4.6 understand images?+
GPT-Image 2.5 Sunburst 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-Image 2.5 Sunburst or Grok 4.6?+
Neither has a larger sourced maximum output. GPT-Image 2.5 Sunburst is — and Grok 4.6 is —.
Do GPT-Image 2.5 Sunburst and Grok 4.6 support reasoning and tool use?+
GPT-Image 2.5 Sunburst: 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-Image 2.5 Sunburst or Grok 4.6?+
GPT-Image 2.5 Sunburst has 1 sourced provider route; Grok 4.6 has 1, a tie.
Which offers better value, GPT-Image 2.5 Sunburst 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.