Gemini 3.1 Pro vs Claude Haiku 4.5
Both grade F overall. Claude Haiku 4.5 is about 3.2x cheaper per task. By suite, Gemini 3.1 Pro takes real-world issues (D+ to D-) and spec planning is even at F. Both agents run the same private suite cut headless through their own tools, each on its own subscription.Measured
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.
Verdict: Claude Haiku 4.5 vs Gemini 3.1 Pro
Both grade F overall. By suite: Gemini 3.1 Pro takes real-world issues, D+ to D- (53% vs 37% capability); spec planning is even at F (21% vs 21% capability); vibe coding is even at F (27% vs 22% capability). Gemini 3.1 Pro used 15.9% of Google AI Pro's weekly limit per pass, $0.038 per task at the listed price. Claude Haiku 4.5 used 1% of Claude Max 5x's weekly limit per pass, $0.012 per task at the listed price. Per task, Claude Haiku 4.5 is about 3.2x cheaper ($0.012 vs $0.038). Claude Haiku 4.5 is faster on real-world issues: a median task takes 3m 8s against 4m 53s. Both finished every task on it.
Changed since W39: Gemini 3.1 Pro: real-world issues usage 9.8% to 14.8% of the weekly limit, spec planning usage 0.9% to 1.1% of the weekly limit, vibe coding usage 1.0% to 0.7% of the weekly limit; Claude Haiku 4.5: real-world issues D+ to D-.
| Dimension | Gemini 3.1 Pro | Claude Haiku 4.5 | Advantage |
|---|---|---|---|
| Capability | 53% | 37% | +17% (Gemini 3.1 Pro leads) |
| Median task time | 4m 53s | 3m 8s | 1m 45s faster (Claude Haiku 4.5 leads) |
| Approx. task cost | $0.045 / task | $0.015 / task | $0.030 / task lower (Claude Haiku 4.5 leads) |
Gemini 3.1 Pro: 14.8% of Google AI Pro (88.9% / 5h, 14.8% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. Claude Haiku 4.5: 8.0% of Claude Max 5x (8.0% / 5h, 1.0% / 1w) per run. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Gemini 3.1 Pro | Claude Haiku 4.5 | Advantage |
|---|---|---|---|
| Capability | 21% | 21% | +0% (Gemini 3.1 Pro leads) |
| Median task time | 1m 46s | 2m 8s | 23s faster (Gemini 3.1 Pro leads) |
| Approx. task cost | $0.013 / task | $0.002 / task | $0.011 / task lower (Claude Haiku 4.5 leads) |
Gemini 3.1 Pro: 1.1% of Google AI Pro (6.5% / 5h, 1.1% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. Claude Haiku 4.5: 1.0% of Claude Max 5x (1.0% / 5h) per run. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Gemini 3.1 Pro | Claude Haiku 4.5 | Advantage |
|---|---|---|---|
| Capability | 27% | 22% | +5% (Gemini 3.1 Pro leads) |
| Median task time | 4m 38s | 4m 4s | 34s faster (Claude Haiku 4.5 leads) |
| Approx. task cost | $0.034 / task | $0.009 / task | $0.026 / task lower (Claude Haiku 4.5 leads) |
Gemini 3.1 Pro: 0.7% of Google AI Pro (4.4% / 5h, 0.7% / 1w) per good solve. Its weekly limit holds 6 of the week's 33.6 5h windows. Claude Haiku 4.5: 1.3% of Claude Max 5x (1.3% / 5h) per good solve. Its weekly limit holds about 13.8 of the week's 33.6 5h windows. 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, Gemini 3.1 Pro or Claude Haiku 4.5?
Gemini 3.1 Pro clears higher: tier 3 of 5 versus tier 2 for Claude Haiku 4.5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-28.
Which is cheaper per task, Gemini 3.1 Pro or Claude Haiku 4.5?
Gemini 3.1 Pro used 15.9% of Google AI Pro's weekly limit per pass, $0.038 per task at the listed price. Claude Haiku 4.5 used 1% of Claude Max 5x's weekly limit per pass, $0.012 per task at the listed price. Per task, Claude Haiku 4.5 is about 3.2x cheaper ($0.012 vs $0.038).