# Claude Haiku 5.5 vs GPT-6.1 Terra

> Side-by-side benchmark comparison for Claude Haiku 5.5 and GPT-6.1 Terra across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-5-5-vs-gpt-6-1-terra
- Last updated: October 26, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Haiku 5.5 and GPT-6.1 Terra share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Claude Haiku 5.5 has the lower published output-token price.
- GPT-6.1 Terra has the larger published context window at 1.05M.

## Model Snapshot

| Property | Claude Haiku 5.5 | GPT-6.1 Terra |
|----------|----------|----------|
| Creator | Anthropic | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1.05M |
| Independent public score (not head-to-head) | 67.17 | 75.87 |
| Benchmarks Covered | 18 | 10 |
| Pricing (input/output) | $0.10 / $0.50 | $1.00 / $5.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 61.3 (Supported · #24/133)
- GPT-6.1 Terra public-lane score: 72.4 (Estimated · #8/133)

| Benchmark | Claude Haiku 5.5 | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 39.20% | 50.30% | GPT-6.1 Terra |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| MazeBench | 1% | Coming soon | Coming soon |
| Hermes Index | 37.0% | Coming soon | Coming soon |
| Hermes Bench | 71.0% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 72.4% | 74.2% | GPT-6.1 Terra |
| Terminal-Bench-Science 0.1 | Coming soon | 58.3% | Coming soon |
| Agents' Last Exam | Coming soon | 60.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 52 (Supported · #42/154)
- GPT-6.1 Terra public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 1.1 Main | 46.4% | Coming soon | Coming soon |
| Bug Hunt Bench | 21.5 fixes | Coming soon | Coming soon |
| FrontierSWE v2 | 43.8% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 59.9 (#22/26)
- GPT-6.1 Terra public-lane score: 81.8 (Unranked · 2 rankable rows)

| Benchmark | Claude Haiku 5.5 | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 89.00% | Coming soon | Coming soon |
| ARC-AGI-2 | 61.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.5% | Coming soon | Coming soon |
| ARC-AGI-3 Provider Adapter | 2.82% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: Coming soon
- GPT-6.1 Terra public-lane score: 91.6 (#4/58)

| Benchmark | Claude Haiku 5.5 | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 56.10% | Coming soon | Coming soon |
| Chartography (no tools) | 46.4% | Coming soon | Coming soon |
| MMMU-Pro | Coming soon | 85.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 65.7 (Supported · #30/188)
- GPT-6.1 Terra public-lane score: 74.9 (Supported · #12/188)

| Benchmark | Claude Haiku 5.5 | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| HLE w/o tools | 45.9% | Coming soon | Coming soon |
| HealthBench (raw) | Coming soon | 51.1% | Coming soon |
| HealthBench (length-adjusted) | Coming soon | 55.1% | Coming soon |
| HealthBench Professional | Coming soon | 62.7% | Coming soon |
| HealthBench Professional (raw) | Coming soon | 64.2% | Coming soon |
| HealthBench Hard | Coming soon | 31.4% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 79.1 (Unranked · 2 rankable rows)
- GPT-6.1 Terra public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | GPT-6.1 Terra | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 75.088% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 46.341% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Haiku 5.5 and GPT-6.1 Terra?

Not yet. The models share only 2 sourced benchmark rows, 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 5.5 vs GPT-6 Astra](/compare/claude-haiku-5-5-vs-gpt-6-astra)
- [GPT-6.1 Terra vs GPT-6 Astra](/compare/gpt-6-1-terra-vs-gpt-6-astra)
- [Claude Haiku 5.5 vs GPT-6.1 Sol](/compare/claude-haiku-5-5-vs-gpt-6-1-sol)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)

## Explore More

- [Claude Haiku 5.5 profile](/models/claude-haiku-5-5)
- [GPT-6.1 Terra profile](/models/gpt-6-1-terra)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)