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OpenAI: GPT-5.5 vs Thinking Machines: Inkling

GPT-5.5 (low) leads on average score with 9.3 vs 6.1. Inkling (low) has the lower benchmark cost at $0.187 vs $1.253. Inkling (low) is faster at 5.15s vs 10.13s, with pass rates of 86.4% vs 54.6%.

Recommended modelGPT-5.5 (low)It has the strongest score in this comparison (9.3) and the best overall balance of cost and response time across all 2 models.

Last updated at: 2026-07-18

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 Inkling Inkling low Release: 2026-07-18
Score 9.3 6.1
Rank #6 #119
Reliability 10.0 9.9
Consistency 10.0 8.6
Tests Correct
Attempt pass rate 86.4% 54.6%
Flaky tests 0 4
Total Runs 66 66
Cost per result 6.594 1.866
Total Cost $1.253 $0.187
Input Price $5.000 / 1M $1.000 / 1M
Output Price $30.000 / 1M $4.050 / 1M
Total Input Tokens 80,058 109,884
Output Tokens 5,378 8,579
Reasoning Tokens 23,040 10,343
Response Time (avg) 10.13s 5.15s
Response Time (max) 56.19s 41.58s
Response Time (total) 222.82s 113.39s

Hamster playing table tennis

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

#6 GPT-5.5

low
Cost
$0.068
Time
37.0s
Tokens
2,339 tok

#119 Thinking Machines: Inkling

low
Cost
$0.002
Time
6.1s
Tokens
502 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
GPT-5.5 10.0 10.0 100.0% 0 15.04s 7,302 423 6,402
Inkling 5.1 7.2 22.2% 1 8.71s 7,374 355 4,961

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