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Claude Sonnet 5 vs GPT-5.6 Terra

Claude Sonnet 5 leads on average score with 5.9 vs 5.8. GPT-5.6 Terra has the lower benchmark cost at $0.377 vs $1.095. GPT-5.6 Terra is faster at 4.11s vs 8.60s, with pass rates of 40.6% vs 40.6%.

Last updated at: 2026-10-07

Compared models

Rank
#261
Total Output Tokens
30,777
Response Time (avg)
8.60s
Total Cost
$1.095
Rank
#265
Total Output Tokens
7,381
Response Time (avg)
4.11s
Total Cost
$0.377
Recommended model GPT-5.6 Terra

Its score stays close to the best score here (5.8 vs 5.9), while costing about 2.9x less than Claude Sonnet 5.

Detailed comparison

Metric Claude Sonnet 5 Claude Sonnet 5 none Release: 2026-06-30 GPT-5.6 Terra GPT-5.6 Terra none Release: 2026-07-09
Score 5.9 5.8
Rank #261 #265
Reliability 10.0 10.0
Consistency 8.4 9.0
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 40.6% 40.6%
Flaky tests 5 3
Total Runs 69 69
Cost per result 15.642 7.313
Total Cost $1.095 $0.377
Input Price $2.000 / 1M $2.000 / 1M
Output Price $10.000 / 1M $12.000 / 1M
Cache Read Price $0.200 / 1M $0.200 / 1M
Cache Write Price $2.500 / 1M $2.500 / 1M
Total Input Tokens 393,560 213,564
Output Tokens 30,466 7,381
Reasoning Tokens 311 0
Response Time (avg) 8.60s 4.11s
Response Time (max) 64.73s 57.98s
Response Time (total) 197.73s 94.52s
Parameters ~1T total (~100B active) ~1T total (~60B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

Prompt: Create a detailed SVG illustration of a hamster playing table tennis.

#261 Claude Sonnet 5

none
Cost
$0.061
Time
53.7s
Tokens
6,172 tok

#265 GPT-5.6 Terra

none
Cost
$0.030
Time
14.7s
Tokens
2,082 tok

Top Models by Score

Score vs Total Cost

Response Time (avg)

Score vs Response Time (avg)

Total Output Tokens

Score vs Total Output Tokens

Category Breakdown

Coding Score Consistency Attempt pass rate Flaky tests Tests Correct Response Time (avg) Input Tokens Output Tokens Reasoning Tokens
Claude Sonnet 5 4.6 7.9 22.2% 1 3.67s 10,590 1,864 0
GPT-5.6 Terra 5.5 10.0 33.3% 0 1.00s 7,302 336 0

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