claude-haiku-4-5 vs gpt-5.6-sol
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-sol | Advantage |
|---|---|---|---|
| Capability | 63% | 60% | +3% (claude-haiku-4-5 leads) |
| Median task time | 3m 58s | 2m 28s | 1m 29s faster (gpt-5.6-sol leads) |
| Approx. task cost | $0.005 / task | $0.011 / task | $0.006 / task lower (claude-haiku-4-5 leads) |
claude-haiku-4-5: 5.0% of Claude Max 20x (5.0% / 5h, 1.0% / 1w) per run. gpt-5.6-sol: 3.5% of ChatGPT Plus (3.5% / 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-sol | Advantage |
|---|---|---|---|
| Capability | 24% | 67% | +43% (gpt-5.6-sol leads) |
| Median task time | 3m 4s | 4m 11s | 1m 7s faster (claude-haiku-4-5 leads) |
| Approx. task cost | $0.003 / task | $0.010 / task | $0.007 / task lower (claude-haiku-4-5 leads) |
claude-haiku-4-5: 1.0% of Claude Max 20x (1.0% / 5h) per run. gpt-5.6-sol: 0.9% of ChatGPT Plus (0.9% / 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-sol | Advantage |
|---|---|---|---|
| Capability | 23% | 56% | +33% (gpt-5.6-sol leads) |
| Median task time | 4m 18s | 3m 43s | 34s faster (gpt-5.6-sol leads) |
| Approx. task cost | not measured | $0.011 / task | - |
claude-haiku-4-5: 0.0% of Claude Max 20x per good solve. gpt-5.6-sol: 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-sol?
gpt-5.6-sol clears higher: tier 4 of 5 versus tier 2 for claude-haiku-4-5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-18.
How much do claude-haiku-4-5 and gpt-5.6-sol cost?
claude-haiku-4-5 runs on Claude Max 20x at $200/month (public price as of 2026-08-05). gpt-5.6-sol runs on ChatGPT Plus at $20/month (public price as of 2026-07-20).