claude-haiku-4-5 vs gpt-5.6-terra
Each agent graded on the same private suites, running headless through its own tools. Advantages are oriented so a win is a win, whichever way the metric runs.
| Dimension | claude-haiku-4-5 | gpt-5.6-terra | Advantage |
|---|---|---|---|
| Capability | 28% | 53% | +25% (gpt-5.6-terra leads) |
| Median task time | 3m 31s | 1m 57s | 1m 34s faster (gpt-5.6-terra leads) |
| Approx. task cost | $0.003 / task | $0.006 / task | $0.004 / task lower (claude-haiku-4-5 leads) |
claude-haiku-4-5: 3.0% of Claude Max 20x (3.0% / 5h, 1.0% / 1w) per run. gpt-5.6-terra: 2.1% of ChatGPT Plus (2.1% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | claude-haiku-4-5 | gpt-5.6-terra | Advantage |
|---|---|---|---|
| Capability | 23% | 52% | +29% (gpt-5.6-terra leads) |
| Median task time | 3m 50s | 3m 12s | 38s faster (gpt-5.6-terra leads) |
| Approx. task cost | $0.007 / task | $0.008 / task | $0.001 / task lower (claude-haiku-4-5 leads) |
claude-haiku-4-5: 0.5% of Claude Max 20x (0.5% / 5h) per good solve. gpt-5.6-terra: 0.2% of ChatGPT Plus (0.2% / 1w) per good solve. Each figure is a share of that agent's own plan, so there is no delta to draw.
Grades and deltas are comparable only within a suite version. See methodology.
Frequently asked questions
Which is better for coding, claude-haiku-4-5 or gpt-5.6-terra?
gpt-5.6-terra clears higher: tier 3 of 5 versus tier 1 for claude-haiku-4-5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-10.
How much do claude-haiku-4-5 and gpt-5.6-terra cost?
claude-haiku-4-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05). gpt-5.6-terra runs on ChatGPT Plus at $20/month (public price as of 2026-07-20).