OpenAI: GPT-3.5 Turbo (older v0613)

GPT-3.5 Turbo (v0613) is an older OpenAI text-only model with a 4,095-token context window, making it suitable for shorter, self-contained tasks rather than lengthy documents or conversations. It accepts text input only, supports tool use, and does not offer native reasoning or structured output. At this context length, users working with extended threads or large codebases will hit limits quickly. At $1.00 per million input tokens and $2.00 per million output tokens, it sits in the budget tier, which is its main argument for consideration. However, there is no independent benchmark coverage available, so its quality relative to newer or similarly priced alternatives is unverified by external testing. Teams running high-volume, low-complexity workloads on a tight budget might shortlist it, but anyone needing confidence in task quality should weigh that gap in benchmark data carefully before committing.