Model comparison
Claude Haiku 4.5 vs GPT-4o
Head-to-head evidence from 2 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Haiku 4.5 #77 (Estimated); GPT-4o #165 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Haiku 4.5 and GPT-4o share 2 comparable benchmark results. 1 of 8 categories are comparable. 3 results are unique to Claude Haiku 4.5; 11 to GPT-4o.
Updated July 20, 2026- Shared results
- 2
- Claude Haiku 4.5 only
- 3
- GPT-4o only
- 11
- Comparable categories
- 1 / 8
Pick Claude Haiku 4.5 if you want the stronger benchmark profile. GPT-4o only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 2 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Claude Haiku 4.5 is clearly ahead on the BenchAlign aggregate, 56.58 to 41.49. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Haiku 4.5's sharpest advantage is in mathematics, where it averages 4.9 against 0.3. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 5.903% to 0.345%.
GPT-4o is also the more expensive model on tokens at $2.50 input / $10.00 output per 1M tokens, versus $1.00 input / $5.00 output per 1M tokens for Claude Haiku 4.5. That is roughly 2.0x on output cost alone. Claude Haiku 4.5 gives you the larger context window at 200K, compared with 128K for GPT-4o.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Claude Haiku 4.5 | Δ | GPT-4o |
|---|---|---|---|
| Math | Claude Haiku 4.54.9 | Margin← 4.6 | GPT-4o0.3 |
| Coding | Claude Haiku 4.573.3 | MarginNo overlap | GPT-4oNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 5.903%B 0.345%Winner: Claude Haiku 4.5Δ 5.6FrontierMath v2 (Tiers 1-3): Claude Haiku 4.5 scored 5.903%; GPT-4o scored 0.345%. Claude Haiku 4.5 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Haiku 4.5 | GPT-4o | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Haiku 4.5$1 input / $5 output | GPT-4o$2.5 input / $10 output | Claude Haiku 4.5 has the lower combined listed price. |
| Generation speedtokens per second | Claude Haiku 4.5Not available | GPT-4o131 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Haiku 4.5Not available | GPT-4o0.81 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Haiku 4.5200K | GPT-4o128K | Claude Haiku 4.5 lists the larger context window. |
Benchmark Deep Dive
Agentic2 benchmarks
Coding2 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Haiku 4.5 | GPT-4o | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | — | 11.2% | Not comparable |
| AA-GPQA DiamondSource | — | 54.3% | Not comparable |
| AA-HLESource | — | 3.3% | Not comparable |
| AA-Omniscience IndexSource | — | -10.7% | Not comparable |
| AA-Omniscience AccuracySource | — | 19.7% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 37.9% | Not comparable |
MathClaude Haiku 4.5 wins2 benchmarks
Multimodal1 benchmarks
| Benchmark | Claude Haiku 4.5 | GPT-4o | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1154 | 864 | Claude Haiku 4.5 leads |
Inst. Following1 benchmarks
| Benchmark | Claude Haiku 4.5 | GPT-4o | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 34.3% | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Haiku 4.5 or GPT-4o?
Claude Haiku 4.5 is ahead on BenchLM's BenchAlign leaderboard, 56.58 to 41.49. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 5.903% and 0.345%.
Which is better for math, Claude Haiku 4.5 or GPT-4o?
Claude Haiku 4.5 has the edge for math in this comparison, averaging 4.9 versus 0.3. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.
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