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

The average score is effectively tied at 9.5 vs 9.5. GPT-5.6 Sol (medium) has the lower benchmark cost at $1.700 vs $2.707. GPT-6 Astra (medium) is faster at 9.90s vs 14.57s, with pass rates of 91.3% vs 91.3%.

Last updated at: 2026-10-19

Compared models

Rank
#20
Total Output Tokens
38,005
Response Time (avg)
14.57s
Total Cost
$1.700
Rank
#21
Total Output Tokens
21,045
Response Time (avg)
9.90s
Total Cost
$2.707
Recommended model GPT-5.6 Sol (medium)

It has the best score here (9.5), while costing about 1.6x less than GPT-6 Astra (medium).

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol medium Release: 2026-07-09 GPT-6 Astra GPT-6 Astra medium Release: 2026-09-04
Score 9.5 9.5
Rank #20 #21
Reliability 10.0 9.9
Consistency 8.9 9.3
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 91.3% 91.3%
Flaky tests 3 2
Total Runs 69 69
Cost per result 8.944 13.535
Total Cost $1.700 $2.707
Input Price $2.000 / 1M $10.000 / 1M
Output Price $10.000 / 1M $50.000 / 1M
Cache Read Price $0.200 / 1M $1.000 / 1M
Cache Write Price $2.500 / 1M $12.500 / 1M
Total Input Tokens 191,341 165,464
Output Tokens 5,665 5,591
Reasoning Tokens 32,340 15,454
Response Time (avg) 14.57s 9.90s
Response Time (max) 79.40s 73.48s
Response Time (total) 335.16s 227.67s
Parameters ~2T total (~150B active) ~2T total (~150B active)
Availability Closed Closed

Cache prices apply to input tokens. Reads reuse cached prompts; writes store them and can cost extra. Output tokens use the output price.

Model generation showcase

Hamster playing table tennis

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

#20 GPT-5.6 Sol

medium
Cost
$0.124
Time
57.2s
Tokens
4,199 tok

#21 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-5.6 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 4.95s 7,302 394 1,673

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