Model comparison
GPT-5.5 Pro vs Inkling
Head-to-head evidence from 3 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: GPT-5.5 Pro unranked; Inkling #17
BenchAlign evidence: GPT-5.5 Pro estimated; Inkling not scored. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.5 Pro and Inkling share 3 comparable benchmark results. 3 of 8 categories are comparable. 4 results are unique to GPT-5.5 Pro; 13 to Inkling.
Updated July 15, 2026- Shared results
- 3
- GPT-5.5 Pro only
- 4
- Inkling only
- 13
- Comparable categories
- 3 / 8
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Inkling only becomes the better choice if mathematics is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 3 shared benchmark results across 2 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.5 Pro is clearly ahead on the provisional aggregate, 75 to 69. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro's sharpest advantage is in agentic, where it averages 90.1 against 69.4. The single biggest benchmark swing on the page is BrowseComp, 90.1% to 77.1%. Inkling does hit back in mathematics, so the answer changes if that is the part of the workload you care about most.
GPT-5.5 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $1.87 input / $4.68 output per 1M tokens for Inkling. That is roughly 38.5x on output cost alone. GPT-5.5 Pro is the reasoning model in the pair, while Inkling is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.5 Pro | Δ | Inkling |
|---|---|---|---|
| Math | GPT-5.5 Pro48.1 | Margin→ 49.0 | Inkling97.1 |
| Agentic | GPT-5.5 Pro90.1 | Margin← 20.7 | Inkling69.4 |
| Knowledge | GPT-5.5 Pro57.2 | Margin← 5.5 | Inkling51.7 |
| Coding | GPT-5.5 ProNot measured | MarginNo overlap | Inkling68.6 |
| Multimodal | GPT-5.5 ProNot measured | MarginNo overlap | Inkling76.5 |
| Inst. Following | GPT-5.5 ProNot measured | MarginNo overlap | Inkling79.8 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.5 Pro | Inkling | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.5 Pro$30 input / $180 output | Inkling$1.87 input / $4.68 output | Inkling has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.5 ProNot available | InklingNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.5 ProNot available | InklingNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.5 Pro1M | Inkling1M | Listed context windows are equal. |
Benchmark Deep Dive
AgenticGPT-5.5 Pro wins4 benchmarks
Coding3 benchmarks
Reasoning1 benchmarks
| Benchmark | GPT-5.5 Pro | Inkling | Result |
|---|---|---|---|
| CritPtSource | 30.6% | — | Not comparable |
KnowledgeGPT-5.5 Pro wins4 benchmarks
MathInkling wins4 benchmarks
Multimodal3 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.5 Pro | Inkling | Result |
|---|---|---|---|
| IFBenchSource | — | 79.8% | Not comparable |
Frequently Asked Questions (4)
Which is better, GPT-5.5 Pro or Inkling?
GPT-5.5 Pro is ahead on BenchLM's provisional leaderboard, 75 to 69. The biggest single separator in this matchup is BrowseComp, where the scores are 90.1% and 77.1%.
Which is better for knowledge tasks, GPT-5.5 Pro or Inkling?
GPT-5.5 Pro has the edge for knowledge tasks in this comparison, averaging 57.2 versus 51.7. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
Which is better for math, GPT-5.5 Pro or Inkling?
Inkling has the edge for math in this comparison, averaging 97.1 versus 48.1. GPT-5.5 Pro stays close enough that the answer can still flip depending on your workload.
Which is better for agentic tasks, GPT-5.5 Pro or Inkling?
GPT-5.5 Pro has the edge for agentic tasks in this comparison, averaging 90.1 versus 69.4. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
Related Comparisons
Explore More
The AI models change fast. We track them for you.
A weekly brief for engineers and researchers covering new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.