Identity
- Status
- active
- Developer ID
gpt-5.6-sol- Released
- Not reported
- Version
- GPT-5.6 Sol
- License
- Unknown
OpenAIGPT-5.6 Sol
GPT-5.6 Sol is OpenAI's flagship API model for complex professional work.
- Token context
- 1,050K tokens
- Inputs
- Text, Image
- Outputs
- Text
- Released
- Not reported
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
OpenaiAvailable | $4.00 | $20.00 | $0.40 | — | Sep 3, 2026 | Provider-reported |
 OpenrouterAvailable | $4.00 | $20.00 | $0.40 | — | Oct 19, 2026 | Provider-reported |
Benchmarks
All benchmark results →| ARC-AGI-1verified-v1-613c385b0c93 | 97.50 | — | — | GPT-5.6 Sol (XHigh)unknown | Original sourcewinner eligible | Third-party benchmark |
| ARC-AGI-2verified-v2-be40992860f9 | 92.50 | — | — | GPT-5.6 Sol (Max)unknown | Original sourcewinner eligible | Third-party benchmark |
| LiveBench2026-06-25-90f8d44da965 | 85.26 | 11,729 | 1,270 | gpt-5.6-sol-maxaverage per case | Recomputedwinner eligible | Third-party benchmark |
| LMArena Document Arenadocument-2026-09-13-a64ca3b12b6e | 1,482.71 | — | 4,818 | gpt-5.6-sol-xhigh; 95% CI [1473.91086026, 1491.51379085]; votes 4818; rank 10unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e | 1,261.13 | — | 60,437 | gpt-5.6-sol-xhigh; 95% CI [1254.84060485, 1267.42091382]; votes 60437; rank 1unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e | 1,457.06 | — | 40,442 | gpt-5.6-sol-xhigh; 95% CI [1452.73485432, 1461.39117296]; votes 40442; rank 43unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Vision Arenavision-2026-10-09-a64ca3b12b6e | 1,281.39 | — | 10,907 | gpt-5.6-sol-xhigh; 95% CI [1273.98131322, 1288.80759068]; votes 10907; rank 35unknown | Original sourcewinner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 82.35 | 15,714 | 50 | GPT-5.6 Sol (ultra)average per case | Original sourcenot winner eligible | Third-party benchmark |
| ToneBench2026-10-17-10-task-e9c76358afb2 | 82.35 | 2,988 | 50 | GPT-5.6 Sol (low)average per case | Original sourcenot winner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Token context
- 1,050K tokens
- Maximum output
- 128K tokens
- Total parameters
- Unknown
- Active parameters
- Unknown
- Knowledge cutoff
- Feb 16, 2026
Interface and Access
- Inputs
- Text, Image
- Outputs
- Text
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- Reasoning
- Yes
- Vision
- Yes
- Tool calling
- Yes
- Capabilities
- chat, generation, reasoning, tools
This page represents one developer model product. Dated API snapshots, serving endpoints, pricing, regions, quantizations, and service tiers attach as versioned aliases or provider details and never create duplicate public model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesgpt-5.6-sol
Explicit Unknowns
- Release date
- Architecture
- Tokenizer
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
GPT-5.6 SolOpenAI | vs | GPT-6 AstraOpenAI | family variantsimage, text |
GPT-5.6 SolOpenAI | vs | Claude Fable 5.1Anthropic | cross-developer peersimage, text |
GPT-5.6 SolOpenAI | vs |  Hy4 previewTencent | cross-developer peerstext |
GPT-5.6 SolOpenAI | vs | cross-developer peersimage, text | |
GPT-5.6 SolOpenAI | vs | Claude Mythos 5.1Anthropic | cross-developer peersimage, text |
GPT-5.6 SolOpenAI | vs | Claude Fable 5Anthropic | cross-developer peersimage, text |
GPT-5.6 SolOpenAI | vs | Claude Opus 4.8Anthropic | cross-developer peersimage, text |
GPT-5.6 SolOpenAI | vs |  Gemini 3 FlashGoogle DeepMind | cross-developer peerstext |
GPT-5.6 SolOpenAI | vs |  Mistral Small 4 119B 2603Mistral AI | cross-developer peersimage, text |
GPT-5.6 SolOpenAI | vs | GPT-5 NanoOpenAI | family variantsimage, text |
GPT-5.6 SolOpenAI | vs | GPT-5.5OpenAI | family variantsimage, text |
GPT-5.6 SolOpenAI | vs | GPT-6 SolOpenAI | family variantsimage, text |
GPT-5.6 SolOpenAI | vs | gpt-oss-120bOpenAI | family variantstext |
Questions
GPT-5.6 Sol FAQs
What is GPT-5.6 Sol?+
GPT-5.6 Sol is OpenAI's flagship API model for complex professional work. It is developed by OpenAI and its current sourced lifecycle status is active.
What inputs and outputs does GPT-5.6 Sol support?+
GPT-5.6 Sol's current record lists Text and Image as input and Text as output.
How much context does GPT-5.6 Sol support?+
The current record lists a 1,050K-token context window and a maximum output of 128K tokens.
Is GPT-5.6 Sol available through an API?+
GPT-5.6 Sol is marked as API-available. The directly sourced provider records currently include Openai and Openrouter.
How much does GPT-5.6 Sol cost through an API?+
The lowest directly sourced prices currently attached to GPT-5.6 Sol are $4.00 per million input tokens through Openai and $20.00 per million output tokens through Openai. Prices are provider-specific and should be checked against each cited observation date.
What capabilities and tasks does GPT-5.6 Sol support?+
GPT-5.6 Sol's recorded capabilities are chat, generation, reasoning, and tools. Its supported tasks are image and text.
Can GPT-5.6 Sol be self-hosted?+
GPT-5.6 Sol is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does GPT-5.6 Sol have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are gpt-5.6-sol.
Which models can GPT-5.6 Sol be compared with?+
The current compatible peer set includes GPT-6 Astra, Claude Fable 5.1, Hy4 preview, Llama 4 Maverick 17B 128E Instruct, and Claude Mythos 5.1. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for GPT-5.6 Sol?+
GPT-5.6 Sol was last verified Aug 28, 2026 from OpenAI's primary source, “Models | OpenAI API.” The evidence is classified as official fact.