Model comparison
GPT-5.1 vs Laguna S 2.1
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.1 #94 (Estimated); Laguna S 2.1 unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.1 and Laguna S 2.1 share 0 comparable benchmark results. 0 of 8 categories are comparable. 21 results are unique to GPT-5.1; 6 to Laguna S 2.1.
Updated July 21, 2026- Shared results
- 0
- GPT-5.1 only
- 21
- Laguna S 2.1 only
- 6
- Comparable categories
- 0 / 8
Benchmark data for GPT-5.1 and Laguna S 2.1 is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
GPT-5.1 is priced at $1.25 input / $10.00 output per 1M tokens, versus $0.10 input / $0.20 output per 1M tokens for Laguna S 2.1. Laguna S 2.1 has the larger context window at 1M, compared with 200K for GPT-5.1.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.1 | Laguna S 2.1 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.1$1.25 input / $10 output | Laguna S 2.1$0.1 input / $0.2 output | Laguna S 2.1 has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.1111 tok/s | Laguna S 2.1Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.157.47 s | Laguna S 2.1Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.1200K | Laguna S 2.11M | Laguna S 2.1 lists the larger context window. |
Benchmark Deep Dive
Agentic7 benchmarks
| Benchmark | GPT-5.1 | Laguna S 2.1 | Result |
|---|---|---|---|
| AA Agentic IndexSource | 21.0% | — | Not comparable |
| τ²-bench resultsSource | 81.9% | — | Not comparable |
| Gert LabsSource | 41.24% | — | Not comparable |
| GDPval-AASource | 24.4% | — | Not comparable |
| GDPval-AASource | 987 | — | Not comparable |
| Terminal-Bench 2.0Source | — | 70.2% | Not comparable |
| Toolathlon-VerifiedSource | — | 49.7% | Not comparable |
Coding7 benchmarks
| Benchmark | GPT-5.1 | Laguna S 2.1 | Result |
|---|---|---|---|
| Vibe Code BenchSource | 24.61% | — | Not comparable |
| AA Coding IndexSource | 49.4% | — | Not comparable |
| AA-SciCodeSource | 43.3% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 70.2% | Not comparable |
| SWE MultilingualSource | — | 78.5% | Not comparable |
| SWE-bench ProSource | — | 59.4% | Not comparable |
| deepSweSource | — | 40.4% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | GPT-5.1 | Laguna S 2.1 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 36.9% | — | Not comparable |
| AA-GPQA DiamondSource | 87.3% | — | Not comparable |
| AA-HLESource | 26.5% | — | Not comparable |
| AA-Omniscience IndexSource | 5.6% | — | Not comparable |
| AA-Omniscience AccuracySource | 37.6% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 51.3% | — | Not comparable |
Math2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.1 | Laguna S 2.1 | Result |
|---|---|---|---|
| AA-IFBenchSource | 72.9% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare GPT-5.1 and Laguna S 2.1 on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for GPT-5.1 and Laguna S 2.1 today?
GPT-5.1: $1.25 input / $10.00 output per 1M tokens Laguna S 2.1: $0.10 input / $0.20 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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