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

GPT-6 Astra (low) leads on average score with 9.5 vs 9.4. GPT-5.6 Sol (medium) has the lower benchmark cost at $0.508 vs $1.289. GPT-6 Astra (low) is faster at 5.09s vs 12.63s, with pass rates of 90.9% vs 90.9%.

Last updated at: 2026-09-04

Rank
#13
Total Output Tokens
34,977
Response Time (avg)
12.63s
Total Cost
$0.508
Rank
#9
Total Output Tokens
10,144
Response Time (avg)
5.09s
Total Cost
$1.289
Recommended model GPT-5.6 Sol (medium)

Its score stays close to the best score here (9.4 vs 9.5), while costing about 2.5x less than GPT-6 Astra (low).

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol medium Release: 2026-07-09 GPT-6 Astra GPT-6 Astra low Release: 2026-09-04
Score 9.4 9.5
Rank #13 #9
Reliability 10.0 9.9
Consistency 8.9 10.0
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 90.9% 90.9%
Flaky tests 3 0
Total Runs 66 66
Cost per result 8.025 6.441
Total Cost $0.508 $1.289
Input Price $2.000 / 1M $10.000 / 1M
Output Price $10.000 / 1M $50.000 / 1M
Total Input Tokens 79,006 78,100
Output Tokens 4,696 4,155
Reasoning Tokens 30,281 5,989
Response Time (avg) 12.63s 5.09s
Response Time (max) 79.40s 28.60s
Response Time (total) 277.88s 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.

#13 GPT-5.6 Sol

medium
Cost
$0.124
Time
57.2s
Tokens
4,199 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 9.40s 7,302 394 4,706
GPT-6 Astra 10.0 10.0 100.0% 0 3.97s 7,302 388 976

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