Model comparison
Grok 4 vs Mistral Medium 3.5 128B
Head-to-head evidence from 13 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok 4 #55 (Supported); Mistral Medium 3.5 128B unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok 4 and Mistral Medium 3.5 128B share 13 comparable benchmark results. 0 of 8 categories are comparable. 3 results are unique to Grok 4; 12 to Mistral Medium 3.5 128B.
Updated July 27, 2026- Shared results
- 13
- Grok 4 only
- 3
- Mistral Medium 3.5 128B only
- 12
- Comparable categories
- 0 / 8
Benchmark data for Grok 4 and Mistral Medium 3.5 128B is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 13 shared benchmark results across 6 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.
Mistral Medium 3.5 128B has the larger context window at 256K, compared with 128K for Grok 4.
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 | Grok 4 | Δ | Mistral Medium 3.5 128B |
|---|---|---|---|
| Coding | Grok 4Not measured | MarginNo overlap | Mistral Medium 3.5 128B77.6 |
| Math | Grok 415.3 | MarginNo overlap | Mistral Medium 3.5 128BNot measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok 4 | Mistral Medium 3.5 128B | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok 4Not available | Mistral Medium 3.5 128B$1.5 input / $7.5 output | A complete price comparison is not available. |
| Generation speedtokens per second | Grok 454 tok/s | Mistral Medium 3.5 128BNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Grok 415.60 s | Mistral Medium 3.5 128BNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Grok 4128K | Mistral Medium 3.5 128B256K | Mistral Medium 3.5 128B lists the larger context window. |
Benchmark Deep Dive
Agentic11 benchmarks
| Benchmark | Grok 4 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| τ²-bench resultsSource | 74.9% | 94.2% | Mistral Medium 3.5 128B leads |
| Gert LabsSource | 42.34% | 39.10% | Grok 4 leads |
| τ³-bench resultsSource | — | 91.4% | Not comparable |
| AA Agentic IndexSource | — | 19.0% | Not comparable |
| GDPval-AASource | — | 21.6% | Not comparable |
| GDPval-AASource | — | 933 | 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 |
Coding4 benchmarks
Reasoning2 benchmarks
Knowledge7 benchmarks
| Benchmark | Grok 4 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 33.3% | 29.9% | Grok 4 leads |
| AA-GPQA DiamondSource | 87.7% | 74.8% | Grok 4 leads |
| AA-HLESource | 23.9% | 12.8% | Grok 4 leads |
| AA-Omniscience IndexSource | 3.8% | -36.3% | Grok 4 leads |
| AA-Omniscience AccuracySource | 41.4% | 25.1% | Grok 4 leads |
| AA-Omniscience Hallucination RateSource | 64.2% | 82.0% | Grok 4 leads |
| AA Openness IndexSource | — | 33.3% | Not comparable |
Math2 benchmarks
Multimodal1 benchmarks
| Benchmark | Grok 4 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 68.8% | 64.9% | Grok 4 leads |
Inst. Following1 benchmarks
| Benchmark | Grok 4 | Mistral Medium 3.5 128B | Result |
|---|---|---|---|
| AA-IFBenchSource | 53.7% | 68.8% | Mistral Medium 3.5 128B leads |
Frequently Asked Questions (3)
Can I compare Grok 4 and Mistral Medium 3.5 128B 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 Grok 4 and Mistral Medium 3.5 128B today?
Grok 4: Pricing unavailable Mistral Medium 3.5 128B: $1.50 input / $7.50 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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