Claude Sonnet 5.5 vs GPT-5.6 Terra
Change modelsClaude Sonnet 5.5Anthropic
GPT-5.6 TerraOpenAI
IndexAll categories, out of 100.
77.2 ±2.6 best
68.9 ±2.0
GapIndex points below the top.
Top
−8.3
CoverageIndex weight that has results.
95%
100% best
SpeedOutput tokens per second.
107/s best
66/s
EloLMArena rating and rank.
1469 best
1449
ReleasedMonth of release.
2026-09
2026-07
Input / 1MUS dollars per 1M input tokens.
$2.00
$2.00
Output / 1MUS dollars per 1M output tokens.
$10.00 best
$12.00
Batch output / 1MBatch price per 1M output tokens.
$5.00 best
$6.00
1K chats2K tokens in, 500 out, each.
$9.00 best
$10.00
1K documents20K tokens in, 1K out, each.
$50.00 best
$52.00
1K agent tasks200K tokens in, 20K out, each.
$600.00 best
$640.00
ContextMaximum tokens in one request.
1M
1.05M best
AgenticMulti-step tasks with tools.
77.5 best
68.2
CodingCode writing and repair.
80.8 best
68.4
ReasoningLogic problems and puzzles.
77.8 best
72.5
MultimodalTasks with images and text.
74.4 best
67.3
KnowledgeFacts and expert knowledge.
71.3 best
65.5
MultilingualTasks in many languages.
—
60.7
InstructionTasks with strict prompt rules.
41.5
56.4 best
MathMath problems.
76.1 best
72.8
Benchmarks
63 sharedOnly Claude Sonnet 5.5: 65Only GPT-5.6 Terra: 46
Claude Sonnet 5.5
GPT-5.6 Terra