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OpenAI: GPT-5.5 vs Thinking Machines: Inkling

GPT-5.5 (low) leads on average score with 9.3 vs 8.0. Inkling (high) has the lower benchmark cost at $1.006 vs $1.253. GPT-5.5 (low) is faster at 10.13s vs 64.16s, with pass rates of 86.4% vs 77.3%.

Recommended modelGPT-5.5 (low)It has the best score here (9.3), while responding about 6.3x faster than Inkling (high).

Last updated at: 2026-07-18

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 Inkling Inkling high Release: 2026-07-18
Score 9.3 8.0
Rank #6 #28
Reliability 10.0 9.8
Consistency 10.0 8.9
Tests Correct
Attempt pass rate 86.4% 77.3%
Flaky tests 0 3
Total Runs 66 66
Cost per result 6.594 6.704
Total Cost $1.253 $1.006
Input Price $5.000 / 1M $1.000 / 1M
Output Price $30.000 / 1M $4.050 / 1M
Total Input Tokens 80,058 86,746
Output Tokens 5,378 6,055
Reasoning Tokens 23,040 220,791
Response Time (avg) 10.13s 64.16s
Response Time (max) 56.19s 327.51s
Response Time (total) 222.82s 1411.59s

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

#28 Thinking Machines: Inkling

high
Cost
$0.005
Time
32.2s
Tokens
1,275 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 8.5 10.0 66.7% 0 148.36s 7,374 430 78,982

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