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GPT-5.5 (low) vs GPT-6 Astra (medium)

The average score is effectively tied at 9.3 vs 9.4. GPT-5.5 (low) has the lower benchmark cost at $1.257 vs $1.774. GPT-6 Astra (medium) is faster at 8.08s vs 10.15s, with pass rates of 86.4% vs 90.9%.

Last updated at: 2026-09-04

Rank
#16
Total Output Tokens
28,540
Response Time (avg)
10.15s
Total Cost
$1.257
Rank
#14
Total Output Tokens
19,627
Response Time (avg)
8.08s
Total Cost
$1.774
Recommended model GPT-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.

Detailed comparison

Metric GPT-5.5 GPT-5.5 low Release: 2026-04-24 GPT-6 Astra GPT-6 Astra medium Release: 2026-09-04
Score 9.3 9.4
Rank #16 #14
Reliability 10.0 9.9
Consistency 10.0 9.2
Attempts 66/66 66/66
Tests Correct
Attempt pass rate 86.4% 90.9%
Flaky tests 0 2
Total Runs 66 66
Cost per result 6.614 9.337
Total Cost $1.257 $1.774
Input Price $5.000 / 1M $10.000 / 1M
Output Price $30.000 / 1M $50.000 / 1M
Total Input Tokens 80,067 79,264
Output Tokens 5,378 4,789
Reasoning Tokens 23,162 14,838
Response Time (avg) 10.15s 8.08s
Response Time (max) 56.19s 73.48s
Response Time (total) 223.24s 177.70s
Parameters ~1.5T total (~100B 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.

#16 GPT-5.5

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

#14 GPT-6 Astra

medium
Cost
$0.231
Time
81.0s
Tokens
4,708 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
GPT-6 Astra 10.0 10.0 100.0% 0 4.95s 7,302 394 1,673

Quick Compare

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