Claude Opus 5.5 vs GPT-6.1 Terra
Change modelsClaude Opus 5.5Anthropic
GPT-6.1 TerraOpenAI
IndexAll categories, out of 100.
78.6 ±2.4 best
77.1 ±3.8
GapIndex points below the top.
Top
−1.5 · no clear gap
CoverageIndex weight that has results.
95% best
90%
SpeedOutput tokens per second.
76/s best
46/s
EloLMArena rating and rank.
1513
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ReleasedMonth of release.
2026-09
2026-10
Input / 1MUS dollars per 1M input tokens.
$4.00
$1.00 best
Output / 1MUS dollars per 1M output tokens.
$20.00
$5.00 best
Batch output / 1MBatch price per 1M output tokens.
$10.00
$2.50 best
1K chats2K tokens in, 500 out, each.
$18.00
$4.50 best
1K documents20K tokens in, 1K out, each.
$100.00
$25.00 best
1K agent tasks200K tokens in, 20K out, each.
$1,200.00
$300.00 best
ContextMaximum tokens in one request.
1M
1.05M best
AgenticMulti-step tasks with tools.
74.1
78.6 best
CodingCode writing and repair.
81.8 best
74.4
ReasoningLogic problems and puzzles.
80.8
81.3 best
MultimodalTasks with images and text.
74.1 best
73.2
KnowledgeFacts and expert knowledge.
79.2 best
70.5
MultilingualTasks in many languages.
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InstructionTasks with strict prompt rules.
59.6
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MathMath problems.
77.7 best
76.9
Benchmarks
47 sharedOnly Claude Opus 5.5: 110Only GPT-6.1 Terra: 3
Claude Opus 5.5
GPT-6.1 Terra