# Claude Haiku 4.5 Thinking vs GPT-5.4

> Side-by-side benchmark comparison for Claude Haiku 4.5 Thinking and GPT-5.4 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-4-5-thinking-vs-gpt-5-4
- Last updated: September 4, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Haiku 4.5 Thinking and GPT-5.4 share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-5.4 has the larger published context window at 1.05M.

## Model Snapshot

| Property | Claude Haiku 4.5 Thinking | GPT-5.4 |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 1.05M |
| Independent public score (not head-to-head) | null | 70.96 |
| Benchmarks Covered | 1 | 37 |
| Pricing (input/output) | N/A | $2.50 / $15.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 56.4 (Supported · #35/151)

| Benchmark | Claude Haiku 4.5 Thinking | GPT-5.4 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | Coming soon | 75.1% | Coming soon |
| CyberGym | Coming soon | 79.0% | Coming soon |
| BrowseComp | Coming soon | 82.7% | Coming soon |
| OSWorld-Verified | Coming soon | 75% | Coming soon |
| MCP Atlas | Coming soon | 70.6% | Coming soon |
| Toolathlon | Coming soon | 54.6% | Coming soon |
| τ²-bench results | Coming soon | 98.9% | Coming soon |
| Claw-Eval | Coming soon | 60.3% | Coming soon |
| DeepSearchQA | Coming soon | 73.6% | Coming soon |
| Gert Labs | Coming soon | 64.89% | Coming soon |
| ResearchClawBench | Coming soon | 15.3% | Coming soon |
| JobBench | Coming soon | 38.9% | Coming soon |
| ExploitGym | Coming soon | 6.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 54 (Supported · #49/183)

| Benchmark | Claude Haiku 4.5 Thinking | GPT-5.4 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 11.39% | 67.42% | GPT-5.4 |
| LiveCodeBench Pro | Coming soon | 87.5% | Coming soon |
| SWE-bench Pro | Coming soon | 57.7% | Coming soon |
| React Native Evals | Coming soon | 85.3% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 69.3 (#20/48)

| Benchmark | Claude Haiku 4.5 Thinking | GPT-5.4 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 81.2% | Coming soon |
| OfficeQA Pro | Coming soon | 53.2% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 82.1% | Coming soon |
| CharXiv | Coming soon | 82.8% | Coming soon |
| ERQA | Coming soon | 65.4% | Coming soon |
| SimpleVQA | Coming soon | 61.1% | Coming soon |
| ScreenSpot Pro | Coming soon | 85.4% | Coming soon |
| ZeroBench | Coming soon | 41.0% | Coming soon |
| MedXpertQA (MM) | Coming soon | 77.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 57 (#19/22)

| Benchmark | Claude Haiku 4.5 Thinking | GPT-5.4 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 74.0% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.2% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 69.2 (Supported · #16/181)

| Benchmark | Claude Haiku 4.5 Thinking | GPT-5.4 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 92.8% | Coming soon |
| HLE | Coming soon | 52.1% | Coming soon |
| HLE w/o tools | Coming soon | 39.8% | Coming soon |
| GPQA-D | Coming soon | 92.8% | Coming soon |
| HealthBench Hard | Coming soon | 40.1% | Coming soon |
| MedXpertQA (Text) | Coming soon | 59.6% | Coming soon |
| HealthBench Professional | Coming soon | 48.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 90.4 (#19/120)

### Mathematics

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- GPT-5.4 public-lane score: 64.5 (Unranked · 2 rankable rows)

| Benchmark | Claude Haiku 4.5 Thinking | GPT-5.4 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 47.600% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 27.100% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Haiku 4.5 Thinking and GPT-5.4?

Not yet. The models share only 1 sourced benchmark row, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Claude Haiku 4.5 Thinking vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [GPT-5.4 vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-gpt-5-4)
- [Claude Haiku 4.5 Thinking vs GPT-5.4 mini](/compare/claude-haiku-4-5-thinking-vs-gpt-5-4-mini)
- [GPT-5.4 vs GPT-5.4 mini](/compare/gpt-5-4-vs-gpt-5-4-mini)

## Explore More

- [Claude Haiku 4.5 Thinking profile](/models/claude-haiku-4-5-thinking)
- [GPT-5.4 profile](/models/gpt-5-4)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)