# GPT-5.6 Terra vs Ornith-1.5-35B-A3B > Side-by-side benchmark comparison for GPT-5.6 Terra and Ornith-1.5-35B-A3B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks. - Canonical page: https://benchlm.ai/compare/gpt-5-6-terra-vs-ornith-1-5-35b-a3b - Last updated: October 2, 2026 - Shared sourced benchmarks: 7 - HTML indexing: indexable - Ranking lane: BenchAlign v5.8 ## Quick Verdict GPT-5.6 Terra leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests. ## Summary - GPT-5.6 Terra has the higher overall point estimate 73.21 to 32.61. Conditional score ranges do not establish rank confidence. - The clearest category separation is in coding, where the averages are 64.3 for GPT-5.6 Terra and 24 for Ornith-1.5-35B-A3B. - The biggest single benchmark swing is DeepSWE in Coding, with scores of 69.6% and 22.0%. - Ornith-1.5-35B-A3B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use. - GPT-5.6 Terra also has the larger context window at 1.05M. ## Model Snapshot | Property | GPT-5.6 Terra | Ornith-1.5-35B-A3B | |----------|----------|----------| | Creator | OpenAI | Ornith AI | | Type | Proprietary | Open Weight | | Reasoning | Reasoning | Reasoning | | Context | 1.05M | 262K | | Overall Score | 73.21 | 32.61 | | Benchmarks Covered | 33 | 18 | | Pricing (input/output) | $2.00 / $12.00 | $0.00 / $0.00 | ## Category Breakdown ### Agentic - Winner: Directional only - GPT-5.6 Terra public-lane score: 59.2 (Supported · #24/119) - Ornith-1.5-35B-A3B public-lane score: 23.5 (Estimated · #95/119) | Benchmark | GPT-5.6 Terra | Ornith-1.5-35B-A3B | Winner | |-----------|-----------|-----------|--------| | Terminal-Bench 3.0 | 20.8% | Coming soon | Coming soon | | Terminal-Bench 2.1 | 87.4% | 67.8% | GPT-5.6 Terra | | BrowseComp | 87.5% | 67.6% | GPT-5.6 Terra | | OSWorld 2.0 | 50.2% | Coming soon | Coming soon | | CyberGym | 81.8% | Coming soon | Coming soon | | ExploitGym | 23.2% | Coming soon | Coming soon | | Toolathlon | 53.1% | Coming soon | Coming soon | | Terminal-Bench 2.1 (Vals) | 77.5% | Coming soon | Coming soon | | ApprenticeBench | 16% | Coming soon | Coming soon | | HLE w/ tools | Coming soon | 33.4% | Coming soon | | MCP Atlas | Coming soon | 70.2% | Coming soon | | Toolathlon-Verified | Coming soon | 48.7% | Coming soon | | WideResearch | Coming soon | 67.8% | Coming soon | | Claw-Eval | Coming soon | 72.5% | Coming soon | ### Coding - Winner: Directional only - GPT-5.6 Terra public-lane score: 64.3 (Supported · #10/144) - Ornith-1.5-35B-A3B public-lane score: 24 (Estimated · #110/144) | Benchmark | GPT-5.6 Terra | Ornith-1.5-35B-A3B | Winner | |-----------|-----------|-----------|--------| | SWE-bench Pro | 63.4% | 59.6% | GPT-5.6 Terra | | Terminal-Bench 2.1 | 87.4% | 67.8% | GPT-5.6 Terra | | DeepSWE | 69.6% | 22.0% | GPT-5.6 Terra | | FrontierCode 1.1 Extended | 55.8% | Coming soon | Coming soon | | CursorBench 3.2 | 64.9% | Coming soon | Coming soon | | VulcanBench v3 | 87.0% | Coming soon | Coming soon | | LiveCodeBench (Vals) | 85.9% | Coming soon | Coming soon | | SWE-bench (Vals) | 95.4% | Coming soon | Coming soon | | CursorBench 4.0 | 41.3% | Coming soon | Coming soon | | SWE-bench Verified | Coming soon | 79% | Coming soon | | SWE Multilingual | Coming soon | 71.4% | Coming soon | | frontierBench | Coming soon | 5.1% | Coming soon | | NL2Repo | Coming soon | 46.2% | Coming soon | ### Reasoning - Winner: Not comparable - GPT-5.6 Terra public-lane score: 65.5 (#19/27) - Ornith-1.5-35B-A3B public-lane score: Coming soon | Benchmark | GPT-5.6 Terra | Ornith-1.5-35B-A3B | Winner | |-----------|-----------|-----------|--------| | ARC-AGI-2 | 83.9% | Coming soon | Coming soon | | ARC-AGI-3 | 0.8% | Coming soon | Coming soon | ### Multimodal & Grounded - Winner: Not comparable - GPT-5.6 Terra public-lane score: 78.2 (#16/49) - Ornith-1.5-35B-A3B public-lane score: Coming soon | Benchmark | GPT-5.6 Terra | Ornith-1.5-35B-A3B | Winner | |-----------|-----------|-----------|--------| | MMMU-Pro | 80.7% | Coming soon | Coming soon | | MMMU-Pro w/ Python | 82% | Coming soon | Coming soon | ### Knowledge - Winner: Directional only - GPT-5.6 Terra public-lane score: 70.6 (Supported · #12/171) - Ornith-1.5-35B-A3B public-lane score: 34.5 (Estimated · #119/171) | Benchmark | GPT-5.6 Terra | Ornith-1.5-35B-A3B | Winner | |-----------|-----------|-----------|--------| | GPQA | 92.9% | 89.2% | GPT-5.6 Terra | | GPQA-D | 92.9% | 89.2% | GPT-5.6 Terra | | HLE-Verified | 51.1% | Coming soon | Coming soon | | LABBench2 | 81.2% | Coming soon | Coming soon | | HealthBench Professional | 57.7% | Coming soon | Coming soon | | HealthBench Hard | 32.7% | Coming soon | Coming soon | | GPQA Diamond (Vals) | 90.9% | Coming soon | Coming soon | | MMLU-Pro (Vals) | 86.7% | Coming soon | Coming soon | | HLE | Coming soon | 25.6% | Coming soon | | HLE w/o tools | Coming soon | 25.6% | Coming soon | ### Instruction Following - Winner: Not comparable - GPT-5.6 Terra public-lane score: 85.7 (#35/125) - Ornith-1.5-35B-A3B public-lane score: Coming soon ### Mathematics - Winner: Not comparable - GPT-5.6 Terra public-lane score: 96.8 (Unranked · 3 rankable rows) - Ornith-1.5-35B-A3B public-lane score: Coming soon | Benchmark | GPT-5.6 Terra | Ornith-1.5-35B-A3B | Winner | |-----------|-----------|-----------|--------| | FrontierMath (legacy) | 84.9% | Coming soon | Coming soon | | FrontierMath v2 (Tiers 1-3) | 84.900% | Coming soon | Coming soon | | FrontierMath v2 (Tier 4) | 68.300% | Coming soon | Coming soon | ## FAQ ### Which is better overall, GPT-5.6 Terra or Ornith-1.5-35B-A3B? GPT-5.6 Terra has the higher overall point estimate. Conditional score ranges do not establish rank confidence. ### Where is the biggest gap between GPT-5.6 Terra and Ornith-1.5-35B-A3B? The widest category gap is in coding, where the averages are 64.3 for GPT-5.6 Terra and 24 for Ornith-1.5-35B-A3B. ### How many benchmarks does GPT-5.6 Terra cover on BenchLM? GPT-5.6 Terra currently has 33 sourced benchmark scores on BenchLM. ### How many benchmarks does Ornith-1.5-35B-A3B cover on BenchLM? Ornith-1.5-35B-A3B currently has 18 sourced benchmark scores on BenchLM. ## Related Comparisons - [GPT-5.6 Terra vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-gpt-5-6-terra) - [Ornith-1.5-35B-A3B vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-ornith-1-5-35b-a3b) - [GPT-5.6 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-terra) - [Ornith-1.5-35B-A3B vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-ornith-1-5-35b-a3b) ## Explore More - [GPT-5.6 Terra profile](/models/gpt-5-6-terra) - [Ornith-1.5-35B-A3B profile](/models/ornith-1-5-35b-a3b) - [Compare Pricing](/llm-pricing) - [Alternative Finder](/tools/alternative-finder) - [LLM Selector](/tools/llm-selector) - [Overall Rankings](/best/overall)