Model comparison
Grok 4 Fast (Reasoning) vs Inkling
Head-to-head evidence from 10 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: Grok 4 Fast (Reasoning) unranked; Inkling #17
BenchAlign evidence: Grok 4 Fast (Reasoning) supported; Inkling not scored. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok 4 Fast (Reasoning) and Inkling share 10 comparable benchmark results. 0 of 8 categories are comparable. 4 results are unique to Grok 4 Fast (Reasoning); 22 to Inkling.
Updated July 16, 2026- Shared results
- 10
- Grok 4 Fast (Reasoning) only
- 4
- Inkling only
- 22
- Comparable categories
- 0 / 8
Benchmark data for Grok 4 Fast (Reasoning) and Inkling is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 10 shared benchmark results across 4 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.
Grok 4 Fast (Reasoning) has the larger context window at 2M, compared with 1M for Inkling.
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 Fast (Reasoning) | Δ | Inkling |
|---|---|---|---|
| Agentic | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Inkling69.4 |
| Coding | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Inkling68.6 |
| Knowledge | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Inkling51.7 |
| Math | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Inkling97.1 |
| Multimodal | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Inkling76.5 |
| Inst. Following | Grok 4 Fast (Reasoning)Not measured | MarginNo overlap | Inkling79.8 |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok 4 Fast (Reasoning) | Inkling | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok 4 Fast (Reasoning)Not available | Inkling$1.87 input / $4.68 output | A complete price comparison is not available. |
| Generation speedtokens per second | Grok 4 Fast (Reasoning)Not available | InklingNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Grok 4 Fast (Reasoning)Not available | InklingNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Grok 4 Fast (Reasoning)2M | Inkling1M | Grok 4 Fast (Reasoning) lists the larger context window. |
Benchmark Deep Dive
Agentic10 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Inkling | Result |
|---|---|---|---|
| τ²-bench resultsSource | 65.8% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 63.8% | Not comparable |
| BrowseCompSource | — | 77.1% | Not comparable |
| MCP AtlasSource | — | 74.1% | Not comparable |
| Design Arena Agentic Web DevSource | — | 1258 | Not comparable |
| AA Agentic IndexSource | — | 32.3% | Not comparable |
| GDPval-AASource | — | 36.9% | Not comparable |
| GDPval-AASource | — | 1239 | Not comparable |
| AA BriefcaseSource | — | 836 | Not comparable |
| AA Tau3 BankingSource | — | 23.7% | Not comparable |
Coding7 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Inkling | Result |
|---|---|---|---|
| Vibe Code BenchSource | 0.00% | — | Not comparable |
| Terminal-Bench HardSource | 18.9% | — | Not comparable |
| AA-SciCodeSource | 44.2% | 46.1% | Inkling leads |
| SWE-bench VerifiedSource | — | 77.6% | Not comparable |
| SWE-bench ProSource | — | 54.3% | Not comparable |
| Terminal-Bench 2.0Source | — | 63.8% | Not comparable |
| AA Coding IndexSource | — | 52.1% | Not comparable |
Reasoning2 benchmarks
Knowledge10 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Inkling | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 27.4% | 40.7% | Inkling leads |
| AA-GPQA DiamondSource | 84.7% | 87.2% | Inkling leads |
| AA-HLESource | 17.0% | 29.7% | Inkling leads |
| AA-Omniscience IndexSource | -28.4% | 2.1% | Inkling leads |
| AA-Omniscience AccuracySource | 22.6% | 40.0% | Inkling leads |
| AA-Omniscience Hallucination RateSource | 66.0% | 63.1% | Inkling leads |
| GPQASource | — | 87.9% | Not comparable |
| GPQA-DSource | — | 87.9% | Not comparable |
| HLESource | — | 46% | Not comparable |
| HLE w/o toolsSource | — | 30% | Not comparable |
Math1 benchmarks
| Benchmark | Grok 4 Fast (Reasoning) | Inkling | Result |
|---|---|---|---|
| AIME26Source | — | 97.1% | Not comparable |
Multimodal4 benchmarks
Frequently Asked Questions (3)
Can I compare Grok 4 Fast (Reasoning) and Inkling 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 Fast (Reasoning) and Inkling today?
Inkling: $1.87 input / $4.68 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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