Compare · ModelsLive · 2 picked · head to head
Claude Sonnet 5.5 vs GPT-6.1 Terra
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-6.1 Terra wins on 7/12 benchmarks
GPT-6.1 Terra wins 7 of 12 shared benchmarks. Leads in math · general · knowledge.
Category leads
agentic·Claude Sonnet 5.5math·GPT-6.1 Terrageneral·GPT-6.1 Terraknowledge·GPT-6.1 Terracoding·Claude Sonnet 5.5reasoning·Claude Sonnet 5.5
Hype vs Reality
Attention vs performance
Claude Sonnet 5.5
#18 by perf·#11 by attention
GPT-6.1 Terra
#14 by perf·#2 by attention
Best value
GPT-6.1 Terra
2.0x better value than Claude Sonnet 5.5
Claude Sonnet 5.5
11.9 pts/$
$6.00/M
GPT-6.1 Terra
24.1 pts/$
$3.00/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
12 benchmarks · 2 models
Claude Sonnet 5.5GPT-6.1 Terra
APEX-Agents
Claude Sonnet 5.5 leads by +7.2
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Sonnet 5.5
75.5
GPT-6.1 Terra
68.3
FrontierMath-Tier-4-v2-Private
GPT-6.1 Terra leads by +12.2
Claude Sonnet 5.5
80.5
GPT-6.1 Terra
92.7
FrontierMath-Tiers-1-3-v2-Private
GPT-6.1 Terra leads by +2.2
Claude Sonnet 5.5
93.4
GPT-6.1 Terra
95.7
Furniture Assembly
GPT-6.1 Terra leads by +5.9
Claude Sonnet 5.5
64.3
GPT-6.1 Terra
70.2
GPQA diamond
Claude Sonnet 5.5 leads by +1.8
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Sonnet 5.5
98.0
GPT-6.1 Terra
96.3
Mirrorcode
Claude Sonnet 5.5 leads by +21.1
Claude Sonnet 5.5
97.8
GPT-6.1 Terra
76.7
Mystery Game Puzzles
GPT-6.1 Terra leads by +9.9
Claude Sonnet 5.5
61.5
GPT-6.1 Terra
71.4
OTIS Mock AIME 2024-2025
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Sonnet 5.5
100.0
GPT-6.1 Terra
100.0
SimpleBench
Claude Sonnet 5.5 leads by +4.4
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Claude Sonnet 5.5
71.1
GPT-6.1 Terra
66.6
SimpleQA Verified
GPT-6.1 Terra leads by +10.8
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Sonnet 5.5
46.5
GPT-6.1 Terra
57.3
SpireClimb
GPT-6.1 Terra leads by +21.0
Claude Sonnet 5.5
1.3
GPT-6.1 Terra
22.3
WeirdML v3
GPT-6.1 Terra leads by +3.8
Claude Sonnet 5.5
41.1
GPT-6.1 Terra
44.9
Full benchmark table
| Benchmark | Claude Sonnet 5.5 | GPT-6.1 Terra |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 75.5 | 68.3 |
FrontierMath-Tier-4-v2-Private | 80.5 | 92.7 |
FrontierMath-Tiers-1-3-v2-Private | 93.4 | 95.7 |
Furniture Assembly | 64.3 | 70.2 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 98.0 | 96.3 |
Mirrorcode | 97.8 | 76.7 |
Mystery Game Puzzles | 61.5 | 71.4 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 100.0 | 100.0 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 71.1 | 66.6 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 46.5 | 57.3 |
SpireClimb | 1.3 | 22.3 |
WeirdML v3 | 41.1 | 44.9 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $2.00 | $10.00 | 1.0M tokens (~500 books) | $40.00 | |
| $1.00 | $5.00 | 1.1M tokens (~525 books) | $20.00 |