OpenAI's legacy gpt-3.5-turbo-0613 snapshot. This historic update introduced function calling, improved steerability, and a 16K context sibling.
Capabilities, design details, and architectural traits
GPT-3.5 Turbo (older v0613), identified in the API as gpt-3.5-turbo-0613, is documented as the snapshot that brought function calling to OpenAI's chat models. It replaced the original March release as the model behind the unversioned chat alias.
| Trait | Detail |
|---|---|
| Defining capability | Fine-tuned to support function calling, detecting when a function should be called and responding with JSON that matches the function's signature. |
| Became the new stable default | Became the model behind the unversioned gpt-3.5-turbo alias, automatically replacing the original March snapshot for anyone not pinned to a specific version. |
| Steerability update | Released as a more steerable version of gpt-3.5-turbo compared to the original release, alongside an equivalent update to gpt-4. |
On the same day, OpenAI also introduced gpt-3.5-turbo-16k, a separate snapshot offering four times the context length, while this snapshot kept the standard 4k context window.
No independent benchmark data is available for this model yet.
Evaluate specifications, pricing, and independent benchmark indices
| Model Details | |||
|---|---|---|---|
| General Info | |||
| Provider | OpenAI | Anthropic | Anthropic |
| Release Date | June 13, 2023 | July 24, 2026 | June 9, 2026 |
| Knowledge Cutoff | Sep 2021 | May 2026 | - |
| Context & Limits | |||
| Context Window | 4K | 1M Best Context Window | 1M Best Context Window |
| Pricing (per 1M tokens) | |||
| Input Pricing | Free Best Input Pricing | $5 | $10 |
| Output Pricing | Free Best Output Pricing | $25 | $50 |
| Modalities | |||
| Inputs | text | textimage | textimagefile |
| Outputs | text | text | text |
| Benchmarks (0-100) | |||
| Intelligence Index | - | 63.1 Best Intelligence Index | 62.1 |
| Coding Index | - | 78.0 Best Coding Index | 76.5 |
| Agentic Index | - | 59.2 Best Agentic Index | 56.6 |
Graduate-level reasoning and expert Q&A evaluation.
Extremely difficult logical reasoning and knowledge.
Logical reasoning over long context windows.
Independent evaluation data provided by Artificial Analysis. To view the latest benchmarks and full details, visit their official site.
