GPT-5.1-Codex is cheaper than GPT-3.5 Turbo at $1.25/M vs $1.5/M input tokens.
| Spec | GPT-3.5 Turbo | GPT-5.1-Codex |
|---|---|---|
| Input price | $1.5/M tokens | $1.25/M tokens |
| Output price | $2/M tokens | $10/M tokens |
| Context window | 16K tokens | 400K tokens |
| Released | Mar 2022 | Nov 2025 |
Not enough votes to call it. On the specs, GPT-5.1-Codex has the edge: bigger model tier, newer, bigger context window.
GPT-3.5 Turbo costs 5.0x less per token.
GPT-5.1-Codex wins input (1.2× cheaper)·GPT-3.5 Turbo wins output (5.0× cheaper)
GPT-5.1-Codex uses 50.1x more headings
GPT-5.1-Codex is cheaper than GPT-3.5 Turbo at $1.25/M vs $1.5/M input tokens.
| Spec | GPT-3.5 Turbo | GPT-5.1-Codex |
|---|---|---|
| Input price | $1.5/M tokens | $1.25/M tokens |
| Output price | $2/M tokens | $10/M tokens |
| Context window | 16K tokens | 400K tokens |
| Released | Mar 2022 | Nov 2025 |
Not enough votes to call it. On the specs, GPT-5.1-Codex has the edge: bigger model tier, newer, bigger context window.
GPT-3.5 Turbo costs 5.0x less per token.
GPT-5.1-Codex wins input (1.2× cheaper)·GPT-3.5 Turbo wins output (5.0× cheaper)
GPT-5.1-Codex uses 50.1x more headings