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

GPT-6 Astra (high) leads on average score with 9.9 vs 9.6. GPT-5.6 Sol (low) has the lower benchmark cost at $1.244 vs $4.458. GPT-5.6 Sol (low) is faster at 11.13s vs 20.16s, with pass rates of 87.0% vs 97.1%.

Last updated at: 2026-10-19

Compared models

Rank
#13
Total Output Tokens
22,557
Response Time (avg)
11.13s
Total Cost
$1.244
Rank
#7
Total Output Tokens
55,595
Response Time (avg)
20.16s
Total Cost
$4.458
Recommended model GPT-5.6 Sol (low)

Its score stays close to the best score here (9.6 vs 9.9), while costing about 3.6x less than GPT-6 Astra (high).

Detailed comparison

Metric GPT-5.6 Sol GPT-5.6 Sol low Release: 2026-07-09 GPT-6 Astra GPT-6 Astra high Release: 2026-09-04
Score 9.6 9.9
Rank #13 #7
Reliability 10.0 9.9
Consistency 9.3 9.6
Attempts 69/69 69/69
Tests Correct
Attempt pass rate 87.0% 97.1%
Flaky tests 2 1
Total Runs 69 69
Cost per result 6.545 20.263
Total Cost $1.244 $4.458
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 191,653 167,805
Output Tokens 5,473 5,651
Reasoning Tokens 17,084 49,944
Response Time (avg) 11.13s 20.16s
Response Time (max) 57.11s 254.93s
Response Time (total) 256.08s 463.68s
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.

#13 GPT-5.6 Sol

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

#7 GPT-6 Astra

high
Cost
$0.457
Time
176.7s
Tokens
9,218 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 5.86s 7,302 392 2,387

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