GPT-4o (Aug 2024)
GPT-4o (August 2024) is the dated snapshot of OpenAI's GPT-4o model frozen at the August 6, 2024 checkpoint. This release was notable for introducing structured outputs as a supported feature, allowing developers to constrain GPT-4o responses to valid JSON matching a specified schema — a capability that meaningfully improved reliability for function calling and data extraction workflows. It represents the GPT-4o baseline before the further refinements captured in later snapshots.
Teams that integrated GPT-4o when structured outputs launched in August 2024 often pinned to this version to preserve the exact behavioral and capability profile they tested against. Like all dated OpenAI snapshots, it trades staying on the latest improvements for the stability needed in production systems, evaluation pipelines, or audit-documented deployments.
Key Features
First GPT-4o checkpoint to ship with structured output (JSON schema) support
Version-stable behavior for reproducible production deployments
Multimodal capability including text and image input processing
Reliable function calling for agentic and tool-use applications
Strong code generation and multi-step reasoning
Documented version for audit and compliance requirements
Ideal Use Cases
Applications built around the structured outputs feature at its launch
Data extraction pipelines requiring schema-constrained JSON responses
Production systems frozen at August 2024 for regression safety
Agentic tool-use workflows relying on stable function calling behavior
Compliance workflows requiring a specific, auditable model version
Example Prompts for GPT-4o (Aug 2024)
Technical Specifications
| Provider | OpenAI |
| Category | Text |
| Modality | Text -> Text |
| Context Window | 128,000 tokens |
| Training Cutoff | October 2023 |
Frequently Asked Questions
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