Data points: 123
Model compare
GPT-5.2 vs GPT-5.6 Sol
The readout for GPT-5.2 and GPT-5.6 Sol, before the detailed comparison sheet.
Key Takeaways
Weighted outcome: GPT-5.6 Sol. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.6 Sol
GPT-5.6 Sol has the higher weighted result; Model A / B score 31.4 to 68.6.
Evidence depth
123 data points
Includes 29 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-5.6 Sol
The charts below split 39 high-signal samples across speed, scores, and audit health.
Change comparison
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
Comparison sheet
This report only uses LMSpeed data for GPT-5.2 and GPT-5.6 Sol: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.2 | GPT-5.6 Sol |
|---|---|---|
| Overall leader | Contender | Leading |
| Weighted overall score | 31.4 pts | 68.6 pts |
| Benchmark category leads | 1 categories | 6 categories |
| Operational advantages | Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage | No data |
| Context window | 400K tokens | 1.1M tokens |
| Max output | 128K tokens | 128K tokens |
| Modalities | Input FileImageText Output Text | Input FileImageText Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
Model metadata
Model metadata
| Model compare | GPT-5.2 | GPT-5.6 Sol |
|---|---|---|
| Developer | OpenAI | OpenAI |
| Released | Dec 2025 | Jul 2026 |
| Parameters | No data | No data |
| Tokenizer | GPT | GPT |
| Knowledge cutoff | No data | 2026-02-16 |
| OpenRouter ID | openai/gpt-5.2 | openai/gpt-5.6-sol |
| References | No data | No data |
When to choose each model
This report only uses LMSpeed data for GPT-5.2 and GPT-5.6 Sol: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.2
GPT-5.2 is stronger in benchmark categories (Instruction following) and operational dimensions (Cheapest input price, Average speed, First-token latency, Free providers, Provider coverage).
GPT-5.6 Sol
GPT-5.6 Sol leads these benchmark categories: Agents, Coding, Reasoning, Knowledge, Math.
Benchmark score comparison
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Category performance
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
- Model A coverage
- 7 / 8
- Model B coverage
- 7 / 8
- Shared
- 7 shared categories
Avg. score
GPT-5.2
52.4
Avg. score
GPT-5.6 Sol
61
Agents
GPT-5.6 Sol leads by 19.5
Coding
GPT-5.6 Sol leads by 5.6
Reasoning
GPT-5.6 Sol leads by 7.7
Knowledge
GPT-5.6 Sol leads by 0.4
Math
GPT-5.6 Sol leads by 11.1
Multilingual
No data
Multimodal
GPT-5.6 Sol leads by 17.2
Instruction following
GPT-5.2 leads by 1.0
Professional benchmark details
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Professional benchmark details
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.2
52.0
Rank #69/100 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner83.0
Rank #2/100 · confidence 3 · eval date 2026-07-09
GPT-5.2
winner$1.75/M
Rank #135/179 · confidence 4
GPT-5.6 Sol
$4.00/M
Rank #160/179 · confidence 4
GPT-5.2
winner$4.81/M
Rank #150/179 · confidence 4
GPT-5.6 Sol
$8.00/M
Rank #162/179 · confidence 4
GPT-5.2
winner$14.00/M
Rank #151/179 · confidence 4
GPT-5.6 Sol
$20.00/M
Rank #162/179 · confidence 4
GPT-5.2
52.9
Rank #13/17 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner92.5
Rank #1/17 · confidence 3 · eval date 2026-07-09
GPT-5.2
11.6
Rank #27/83 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner32.3
Rank #1/83 · confidence 3 · eval date 2026-07-09
GPT-5.2
50.8
Rank #25/29 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner93.0
Rank #2/29 · confidence 3 · eval date 2026-07-09
GPT-5.2
winner79.3
Rank #8/100 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
77.7
Rank #15/100 · confidence 3 · eval date 2026-07-09
GPT-5.2
71.2%
Rank #132/211 · confidence 4
GPT-5.6 Sol
winner92.8%
Rank #11/211 · confidence 4
GPT-5.2
8.0%
Rank #126/208 · confidence 4
GPT-5.6 Sol
winner46.0%
Rank #11/208 · confidence 4
GPT-5.2
40.4%
Rank #79/204 · confidence 4
GPT-5.6 Sol
winner56.9%
Rank #5/204 · confidence 4
GPT-5.2
55.6
Rank #32/49 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner64.6
Rank #6/49 · confidence 3 · eval date 2026-07-09
GPT-5.2
52.1
Rank #25/108 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner56.1
Rank #8/108 · confidence 3 · eval date 2026-07-09
GPT-5.2
56.4
Rank #43/81 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner61.5
Rank #23/81 · confidence 3 · eval date 2026-07-09
GPT-5.2
58.3
Rank #29/62 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner96.9
Rank #1/62 · confidence 3 · eval date 2026-07-09
GPT-5.2
18.8
Rank #11/35 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner83.0
Rank #1/35 · confidence 3 · eval date 2026-07-09
GPT-5.2
40.7
Rank #10/47 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner89.0
Rank #1/47 · confidence 3 · eval date 2026-07-09
GPT-5.2
90.3
Rank #27/108 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner94.1
Rank #3/108 · confidence 3 · eval date 2026-07-09
GPT-5.2
37.7
Rank #28/108 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner49.5
Rank #3/108 · confidence 3 · eval date 2026-07-09
GPT-5.2
44.3
Rank #24/101 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner59.4
Rank #3/101 · confidence 3 · eval date 2026-07-09
GPT-5.2
43.3
Rank #29/111 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner58.9
Rank #5/111 · confidence 3 · eval date 2026-07-09
GPT-5.2
81.6
Rank #13/69 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner83.6
Rank #8/69 · confidence 3 · eval date 2026-07-09
GPT-5.2
81.2
Rank #40/101 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner92.2
Rank #12/101 · confidence 3 · eval date 2026-07-09
GPT-5.2
79.5
Rank #11/31 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner83.0
Rank #4/31 · confidence 3 · eval date 2026-07-09
GPT-5.2
68.9
Rank #17/44 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner84.7
Rank #6/44 · confidence 3 · eval date 2026-07-09
GPT-5.2
winner75.4
Rank #19/84 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
72.7
Rank #29/84 · confidence 3 · eval date 2026-07-09
GPT-5.2
22.1
Rank #64/69 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner94.9
Rank #1/69 · confidence 3 · eval date 2026-07-09
GPT-5.2
65.8
Rank #24/31 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner92.2
Rank #1/31 · confidence 3 · eval date 2026-07-09
GPT-5.2
84.8
Rank #46/82 · confidence 3 · eval date 2025-12-11
GPT-5.6 Sol
winner85.1
Rank #44/82 · confidence 3 · eval date 2026-07-09
API audit comparison
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
API audit comparison
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.2 | GPT-5.6 Sol |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Provider examples
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
Provider examples
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | GPT-5.2 | GPT-5.6 Sol |
|---|---|---|
N1N15 tests | GPT-5.2 speed / latency 56 tok/s / 1798ms input / output No data | GPT-5.6 Sol speed / latency N/A / N/A input / output No data |
PackyAPI10 tests | GPT-5.2 speed / latency 94 tok/s / 11492ms input / output No data | GPT-5.6 Sol speed / latency N/A / N/A input / output No data |
YUNWU API10 tests | GPT-5.2 speed / latency N/A / N/A input / output No data | GPT-5.6 Sol speed / latency 53 tok/s / 2164ms input / output No data |
BUZZ5 tests | GPT-5.2 speed / latency 64 tok/s / 3553ms input / output No data | GPT-5.6 Sol speed / latency N/A / N/A input / output No data |
ModelPool5 tests | GPT-5.2 speed / latency 64 tok/s / 5256ms input / output No data | GPT-5.6 Sol speed / latency N/A / N/A input / output No data |
GPT-5.2 gpt-5.2-2025-12-11 speed / latency No data input / output $0/M/$0/M | GPT-5.6 Sol gpt-5.6-sol speed / latency No data input / output $3.65/M/$21.90/M | |
GPT-5.2 gpt-5.2 speed / latency No data input / output $1.34/M/$10.74/M | GPT-5.6 Sol gpt-5.6-sol speed / latency No data input / output $0/M/$0/M | |
GPT-5.2 gpt-5-2 speed / latency No data input / output $0/M/$0/M | GPT-5.6 Sol gpt-5-6-sol speed / latency No data input / output $0/M/$0/M | |
GPT-5.2 gpt-5.2-openai-compact speed / latency No data input / output $0/M/$0/M | GPT-5.6 Sol gpt-5.6-sol speed / latency No data input / output $0/M/$0/M | |
GPT-5.2 gpt-5.2 speed / latency No data input / output $0/request | GPT-5.6 Sol gpt-5.6-sol speed / latency No data input / output $0/request |
FAQ
Weighted outcome: GPT-5.6 Sol. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
- Why is this comparison indexable?
- It has 6 verifiable comparison points, and both models have pricing or benchmark data.
- Are missing metrics invented?
- No. Metrics without LMSpeed data are omitted from this report.