Claude Sonnet 5.5 (High, Default Fallback) vs GPT-6.1 Terra (Low)

Which is better for the money: Claude Sonnet 5.5 (High, Default Fallback) by Anthropic or GPT-6.1 Terra (Low) by OpenAI? Intelligence, total benchmark cost, and end-to-end time from Artificial Analysis & other sources, snapshot 2026-10-27.

Trade-off

AnthropicClaude Sonnet 5.5 (High, Default Fallback)Off the frontier

Intelligence: 46.80
Total cost: $1027

OpenAIGPT-6.1 Terra (Low)Off the frontier

Intelligence: 36.20
Total cost: $115

Verdict

Depends on your budget

Claude Sonnet 5.5 (High, Default Fallba… scores 10.6 points higher (46.8 vs 36.2) but costs 9.0× as much to run the benchmark ($1027 vs $115; premium vs mid-range cost classes). They are not alternatives at one budget: pick Claude Sonnet 5.5 (High, Default Fallba… when you need intelligence above 36.2, and GPT-6.1 Terra (Low) when 36.2 is enough.

Metric	Claude Sonnet 5.5 (High, Default Fallback)	GPT-6.1 Terra (Low)	Difference
Intelligence (higher is better)	46.8	36.2	−22.6% GPT-6.1 Terra (Low) is 22.6% less intelligent
Total AA cost (lower is better)	$1,027.40	$114.52	−88.9% GPT-6.1 Terra (Low) is 88.9% cheaper
End-to-end time (lower is better)	16.58s	6.78s	−59.1% GPT-6.1 Terra (Low) is 59.1% faster
Price per 1M tokens (in / out)	$2.00 / $10.0	$1.00 / $5.00
Input modalities	Text, Image	Text, Image

GPT-6.1 Terra (Low) vs Claude Sonnet 5.5 (High, Default Fallback): 22.6% less intelligence, 88.9% less cost to run the AA benchmark, and 59.1% faster end-to-end.

Open this matchup in the interactive picker Claude Sonnet 5.5 (High, Default Fallback): what beats it GPT-6.1 Terra (Low): what beats it

Today's Pareto frontier

Against the frontier

Claude Sonnet 5.5 (High, Default Fallback) is off the frontier: at the same or lower cost, GPT-6.1 Sol (Xhigh) scores 51.00 for $662.
GPT-6.1 Terra (Low) is off the frontier: at the same or lower cost, MiMo-V2.6-Flash scores 37.90 for $110.

Claude Sonnet 5.5 (High, Default Fallback)GPT-6.1 Terra (Low)Today's Pareto frontierEvery other model

Matchup

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Agents: Accept: text/markdown or ?format=md returns this page as Markdown. JSON: /api/v1/compare/claude-sonnet-5-5-high/gpt-6-1-terra-low · Markdown: /api/v1/compare/claude-sonnet-5-5-high/gpt-6-1-terra-low?format=md · llms.txt · agent skill