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GPT-5.6 Sol (low) vs GPT-6 Astra (low)

GPT-5.6 Sol (low) leads on average score with 9.5 vs 9.5. GPT-5.6 Sol (low) has the lower benchmark cost at $0.357 vs $1.289. GPT-6 Astra (low) is faster at 5.09s vs 9.04s, with pass rates of 86.4% vs 90.9%.

Last updated at: 2026-09-04

Rank
#8
Total Output Tokens
19,946
Response Time (avg)
9.04s
Total Cost
$0.357
Rank
#9
Total Output Tokens
10,144
Response Time (avg)
5.09s
Total Cost
$1.289
Recommended model GPT-5.6 Sol (low)

It has the best score here (9.5), while costing about 3.6x less than GPT-6 Astra (low).

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol low Release: 2026-07-09 GPT-6 Astra GPT-6 Astra low Release: 2026-09-04
Score 9.5 9.5
Rank #8 #9
Reliability 10.0 9.9
Consistency 9.2 10.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 86.4% 90.9%
Flaky tests 2 0
Total Runs 66 66
Cost per result 5.508 6.441
Total Cost $0.357 $1.289
Input Price $2.000 / 1M $10.000 / 1M
Output Price $10.000 / 1M $50.000 / 1M
Total Input Tokens 78,580 78,100
Output Tokens 4,476 4,155
Reasoning Tokens 15,470 5,989
Response Time (avg) 9.04s 5.09s
Response Time (max) 53.91s 28.60s
Response Time (total) 198.97s 112.04s
Parameters ~2T total (~150B active) ~2T total (~150B active)
Availability Closed Closed

Model generation showcase

Hamster playing table tennis

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

#8 GPT-5.6 Sol

low
Cost
$0.062
Time
26.7s
Tokens
2,150 tok

#9 GPT-6 Astra

low
Invalid SVG
Cost
$0.151
Time
48.9s
Tokens
3,094 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-5.6 Sol 10.0 10.0 100.0% 0 11.25s 7,302 412 3,482
GPT-6 Astra 10.0 10.0 100.0% 0 3.97s 7,302 388 976

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