GPT-5.1 Chat is cheaper than GPT-5.6 Terra at $1.25/M vs $2.5/M input tokens.
| Spec | GPT-5.1 Chat | GPT-5.6 Terra |
|---|---|---|
| Input price | $1.25/M tokens | $2.5/M tokens |
| Output price | $10/M tokens | $15/M tokens |
| Context window | 128K tokens | 1.1M tokens |
| Released | Nov 2025 | Jul 2026 |
Not enough votes to call it. On the specs, GPT-5.6 Terra has the edge: newer, bigger context window.
GPT-5.1 Chat is cheaper on both — 2.0× input, 1.5× output
GPT-5.6 Terra uses 112.3x more headings
GPT-5.1 Chat is cheaper than GPT-5.6 Terra at $1.25/M vs $2.5/M input tokens.
| Spec | GPT-5.1 Chat | GPT-5.6 Terra |
|---|---|---|
| Input price | $1.25/M tokens | $2.5/M tokens |
| Output price | $10/M tokens | $15/M tokens |
| Context window | 128K tokens | 1.1M tokens |
| Released | Nov 2025 | Jul 2026 |
Not enough votes to call it. On the specs, GPT-5.6 Terra has the edge: newer, bigger context window.
GPT-5.1 Chat is cheaper on both — 2.0× input, 1.5× output
GPT-5.6 Terra uses 112.3x more headings