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GPT-5.6 Sol Pro

OpenAIfamily · GPT 5.6

GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#

Open in Graph
data quality50

Updated 2 h ago · first seen 11 Sept 2026

model_01M294WVVM3JQ570WS8EQ7VS2P

Overview

Identity

Canonical model
Yesidentity confidence: mediumOne row per real model release. Artifacts (checkpoints, quantisations, conversions) and folded evaluation variants point here.
Official checkpoints
None recordedofficial_checkpoints = hf_repo identifiers carried by the model itself; artifacts are separate entities pointing here through canonical_id.
Artifacts
None recordedSeparate entities (checkpoint · quantization · conversion · packaging) pointing to this model through canonical_id.
Provider deployments
2
API aliases
openai/gpt-5.6-sol-proIdentifiers under which providers and evaluators refer to this model.
Folded evaluation variants
0Effort / thinking variants (…-high, …-non-reasoning) are result configurations of this model, not separate models. Their old URLs redirect here.

Openness

Openness not classified yet — no sourced evidence to place this model in the ontology.

Key facts

Release date

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Knowledge cutoff

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Openrouter id

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Architecture

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Capabilities

Modalities

Modalities
documentimagetext
Input
documentimagetext
Output
text

Capabilities

  • Tool calling

    Yes

    OpenRouter public model & pricing listing · T2

  • Structured output

    Yes

    OpenRouter public model & pricing listing · T2

  • Reasoning

    Yes

    OpenRouter public model & pricing listing · T2

  • Vision

    Yes

    OpenRouter public model & pricing listing · T2

  • Audio

    Unavailable

  • Fine-tuning available

    Unavailable

Context window

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Max output

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Knowledge cutoff

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Tokenizer

Source:OpenRouter public model & pricing listingT2observed 13 h agomedium

Providers & Pricing4

All offers in the price terminal →
Provider deployments, cheapest output first
ProviderContextInput / 1MCached inCache writeOutput / 1MStatusObservedSource
OpenAI APIcheapest outputopenai/gpt-5.6-sol-pro:batch1.05Mout 128K$0.10$1.25active3 h agosince 11 Sept 2026openrouter.aiT2
OpenRouteropenai/gpt-5.6-sol-pro:batch1.05Mout 128K$0.10$1.25active21 min agosince 12 Sept 2026openrouter.aiT2
OpenAI APIopenai/gpt-5.6-sol-pro1.05Mout 128K$0.20$2.5active3 h agosince 11 Sept 2026openrouter.aiT2
OpenRouteropenai/gpt-5.6-sol-pro1.05Mout 128K$0.20$2.5active21 min agosince 12 Sept 2026openrouter.aiT2

USD per 1M tokens as published by each provider; native units (per-request fees, flex/priority tiers) are kept verbatim. Rows are append-only — every price change is kept in the history below. Cost of a workload →

Price history

Step lines per provider; amber markers are recorded changes. Click a marker or a row for the evidence behind that price.

Output price · USD / 1M tokens 2 providers

Output price history of GPT-5.6 Sol Pro$0$2$4$6$8$10$12Sept 26Sept 26Sept 26Sept 26OpenAI API: first observed → $10 · 11 Sept 2026OpenAI API: $10 → $5 · 11 Sept 2026OpenRouter: first observed → $10 · 12 Sept 2026OpenRouter: $10 → $5 · 12 Sept 2026
  • OpenAI API
  • OpenRouter
  • OpenRouter$10 → $512 Sept 2026
  • OpenRouterfirst observed $1012 Sept 2026
  • OpenAI API$10 → $511 Sept 2026
  • OpenAI APIfirst observed $1011 Sept 2026

Input price · USD / 1M tokens 2 providers

Input price history of GPT-5.6 Sol Pro$0$0.50$1$1.5$2$2.5Sept 26Sept 26Sept 26Sept 26OpenAI API: first observed → $2 · 11 Sept 2026OpenAI API: $2 → $1 · 11 Sept 2026OpenRouter: first observed → $2 · 12 Sept 2026OpenRouter: $2 → $1 · 12 Sept 2026
  • OpenAI API
  • OpenRouter
  • OpenRouter$2 → $112 Sept 2026
  • OpenRouterfirst observed $212 Sept 2026
  • OpenAI API$2 → $111 Sept 2026
  • OpenAI APIfirst observed $211 Sept 2026

Versions & Artifacts0

Version history

Context windowfirst observation only

11 Sept 2026current

Knowledge cutofffirst observation only

11 Sept 2026current

Max outputfirst observation only

11 Sept 2026current

Each hop is a claim: click a value for its source, tier and observation time. Nothing is overwritten — a new observation closes the previous claim.

Artifacts 0

No artifact (checkpoint, quantisation, conversion or packaging) points to this model yet.

Timeline4

Full timeline →
  • Listed by providerModelGPT-5.6 Sol ProOpenAI

    OpenRouter lists GPT-5.6 Sol Pro at $1 in / $5 out per 1M tokens

    openrouter
    openrouter.ai
  • Listed by providerModelGPT-5.6 Sol ProOpenAI

    OpenRouter lists GPT-5.6 Sol Pro at $2 in / $10 out per 1M tokens

    openrouter
    openrouter.ai
  • Capabilities changedModelGPT-5.6 Sol ProOpenAI

    GPT-5.6 Sol Pro: modalities changed from ["image", "text"] to ["document", "image", "text"]

    Modalitiesimage, text→document, image, textopenrouter
    openrouter.ai
  • Property changedModelGPT-5.6 Sol ProOpenAI

    GPT-5.6 Sol Pro: modalities input changed from ["image", "text"] to ["document", "image", "text"]

    Input modalitiesimage, text→document, image, textopenrouter
    openrouter.ai

Change history19

Temporal, append-only claims: a new observation closes the previous claim instead of overwriting it. Rewind the record with the as-of picker.

Viewing AI Atlas as of 11 Sept 2026 — attributes exactly as the atlas knew them on that day; later corrections are not shown.

Back to today →

Attributes as of 11 Sept 2026 16 claims in force

Release date
9 Jul 2026
Context window
1.05M tokens
Max output
128K tokens
Knowledge cutoff
Feb 2026
Modalities
image, text
Input modalities
image, text
Output modalities
text
Tokenizer
GPT
File input
Yes
Openrouter id
openai/gpt-5.6-sol-pro
Reasoning
Yes
Structured output
Yes
Supported parameters
include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools
Tool calling
Yes
Vision
Yes
19 claims · 17 properties

Release daterelease_date1

Claim history for Release date
ValueValid from → toStatusSourceConfidenceExtractor
9 Jul 2026 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Context windowcontext_length1

Claim history for Context window
ValueValid from → toStatusSourceConfidenceExtractor
1.05M tokens → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Max outputmax_output_tokens1

Claim history for Max output
ValueValid from → toStatusSourceConfidenceExtractor
128K tokens → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Knowledge cutoffknowledge_cutoff1

Claim history for Knowledge cutoff
ValueValid from → toStatusSourceConfidenceExtractor
Feb 2026 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Modalitiesmodalities2

Claim history for Modalities
ValueValid from → toStatusSourceConfidenceExtractor
document, image, text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic
image, text → supersededOpenRouter public model & pricing listingT2mediumdeterministic

Input modalitiesmodalities_input2

Claim history for Input modalities
ValueValid from → toStatusSourceConfidenceExtractor
document, image, text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic
image, text → supersededOpenRouter public model & pricing listingT2mediumdeterministic

Output modalitiesmodalities_output1

Claim history for Output modalities
ValueValid from → toStatusSourceConfidenceExtractor
text → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Tokenizertokenizer1

Claim history for Tokenizer
ValueValid from → toStatusSourceConfidenceExtractor
GPT → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Descriptiondescription1

Claim history for Description
ValueValid from → toStatusSourceConfidenceExtractor
GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

File inputfile_input1

Claim history for File input
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Openrouter idopenrouter_id1

Claim history for Openrouter id
ValueValid from → toStatusSourceConfidenceExtractor
openai/gpt-5.6-sol-pro → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Openrouter listed atopenrouter_listed_at1

Claim history for Openrouter listed at
ValueValid from → toStatusSourceConfidenceExtractor
9 Jul 2026 → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Reasoningreasoning1

Claim history for Reasoning
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Structured outputstructured_output1

Claim history for Structured output
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Supported parameterssupported_parameters1

Claim history for Supported parameters
ValueValid from → toStatusSourceConfidenceExtractor
include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, seed, structured_outputs, tool_choice, tools → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Tool callingtool_calling1

Claim history for Tool calling
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Visionvision1

Claim history for Vision
ValueValid from → toStatusSourceConfidenceExtractor
Yes → currentcurrentOpenRouter public model & pricing listingT2mediumdeterministic

Claims are temporal and append-only: a new observation closes the previous claim (valid_to) instead of overwriting it. Conflicting claims from different sources are kept side by side and flagged — never averaged. Methodology →

Provenance

Attributed facts

18

Source tiers

T218

Freshest observation

2 h ago

Conflicts

None

Source documents 1

Source documents
SourceDocumentTypeTierLast observedSnapshots
OpenRouter public model & pricing listingopenrouter.ai/api/v1/models catalogueT2· Quality secondary21 min ago10

Tier 1 = official/primary, 2 = quality secondary, 3 = community, 4 = unverified. Every snapshot is archived; see all sources and the methodology.

Data quality (50/100) measures how well AI Atlas knows this entity — completeness, primary-source ratio, freshness, conflicts — never how good the model is. Methodology →