Model comparison
Laguna XS.2 vs Mistral Medium 3.5 128B
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Evidence parity. Laguna XS.2 and Mistral Medium 3.5 128B share 1 comparable benchmark result. 1 of 8 categories are comparable. 4 results are unique to Laguna XS.2; 24 to Mistral Medium 3.5 128B.
Updated July 27, 2026- Shared results
- 1
- Laguna XS.2 only
- 4
- Mistral Medium 3.5 128B only
- 24
- Comparable categories
- 1 / 8
Treat this as a split decision. Laguna XS.2 makes more sense if you want the cheaper token bill; Mistral Medium 3.5 128B is the better fit if coding is the priority.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Laguna XS.2 and Mistral Medium 3.5 128B finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Mistral Medium 3.5 128B is also the more expensive model on tokens at $1.50 input / $7.50 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Laguna XS.2. That is roughly Infinityx on output cost alone.
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 | Laguna XS.2 | Δ | Mistral Medium 3.5 128B |
|---|---|---|---|
| Coding | Laguna XS.260.8 | Margin→ 16.8 | Mistral Medium 3.5 128B77.6 |
| Agentic | Laguna XS.235.7 | MarginNo overlap | Mistral Medium 3.5 128BNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 69.9%B 77.6%Winner: Mistral Medium 3.5 128BΔ 7.7SWE-bench Verified: Laguna XS.2 scored 69.9%; Mistral Medium 3.5 128B scored 77.6%. Mistral Medium 3.5 128B wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Laguna XS.2 | Mistral Medium 3.5 128B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Laguna XS.2$0 input / $0 output | Mistral Medium 3.5 128B$1.5 input / $7.5 output | Laguna XS.2 has the lower combined listed price. |
| Generation speedtokens per second | Laguna XS.2Not available | Mistral Medium 3.5 128BNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Laguna XS.2Not available | Mistral Medium 3.5 128BNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Laguna XS.2256K | Mistral Medium 3.5 128B256K | Listed context windows are equal. |
Benchmark Deep Dive
Agentic12 benchmarks
| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 35.7% | — | Not comparable |
| τ³-bench resultsSource | — | 91.4% | Not comparable |
| AA Agentic IndexSource | — | 19.0% | Not comparable |
| τ²-bench resultsSource | — | 94.2% | Not comparable |
| GDPval-AASource | — | 21.6% | Not comparable |
| GDPval-AASource | — | 933 | Not comparable |
| Gert LabsSource | — | 39.10% | Not comparable |
| AA EnterpriseOps-GymSource | — | 33.7% | Not comparable |
| AA Harvey LABSource | — | 69.1% | Not comparable |
| terminalBenchHardSource | — | 33.3% | Not comparable |
| AA BriefcaseSource | — | 516 | Not comparable |
| AA Tau3 BankingSource | — | 14.4% | Not comparable |
CodingMistral Medium 3.5 128B wins6 benchmarks
| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 69.9% | 77.6% | Mistral Medium 3.5 128B leads |
| SWE MultilingualSource | 57.7% | — | Not comparable |
| SWE-bench ProSource | 46.3% | — | Not comparable |
| Terminal-Bench 2.0Source | 35.7% | — | Not comparable |
| AA Coding IndexSource | — | 46.9% | Not comparable |
| AA-SciCodeSource | — | 39.6% | Not comparable |
Reasoning2 benchmarks
Knowledge7 benchmarks
| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | — | 29.9% | Not comparable |
| AA-GPQA DiamondSource | — | 74.8% | Not comparable |
| AA-HLESource | — | 12.8% | Not comparable |
| AA-Omniscience IndexSource | — | -36.3% | Not comparable |
| AA-Omniscience AccuracySource | — | 25.1% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 82.0% | Not comparable |
| AA Openness IndexSource | — | 33.3% | Not comparable |
Multimodal1 benchmarks
| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| AA-MMMU-ProSource | — | 64.9% | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Laguna XS.2 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 68.8% | Not comparable |
Frequently Asked Questions (2)
Which is better, Laguna XS.2 or Mistral Medium 3.5 128B?
Laguna XS.2 and Mistral Medium 3.5 128B are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for coding, Laguna XS.2 or Mistral Medium 3.5 128B?
Mistral Medium 3.5 128B has the edge for coding in this comparison, averaging 77.6 versus 60.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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