Agentic
Not comparable- Grok 4.1 Fast
- Not ranked
- Trinity-Large-Preview
- Not ranked
- Basis
- BenchAlign lane · 1 vs 0 public rows
- Reading
- Not comparable
Grok 4.1 Fast vs Trinity-Large-Preview
Updated September 4, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
The public evidence has no benchmark result shared by both models, so it does not support a quality verdict. Use the documented cost, context, and runtime rows instead.
0 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Share or export
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Long documents
Prompts that approach the documented context limit
Grok 4.1 Fast
Grok 4.1 Fast has the larger documented context window.
Confidence: documented
Chat turn cost
1K fresh input + 500 output tokens
Grok 4.1 Fast
Grok 4.1 Fast has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Grok 4.1 Fast
Grok 4.1 Fast has the lower estimated token cost for this stated workload. Grok 4.1 Fast has no published cached-input rate, so cached tokens use its listed input rate. Trinity-Large-Preview has no published cached-input rate, so cached tokens use its listed input rate.
Confidence: rate-fallback
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
Grok 4.1 Fast
Grok 4.1 Fast has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Trinity-Large-Preview is not ranked on the public lane for coding, so no winner is named for coding.
Confidence: limited
Agentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Grok 4.1 Fast and Trinity-Large-Preview are not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limited
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
1 Grok 4.1 Fast only
4 Trinity-Large-Preview only
- Shared results
- 0
- Grok 4.1 Fast only
- 1
- Trinity-Large-Preview only
- 4
- Like-for-like categories
- 0 / 8
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.
Coding
Not comparable- Grok 4.1 Fast
- 47.5
- Estimated · #88/183
- Trinity-Large-Preview
- Not ranked
- Basis
- BenchAlign lane · 0 vs 0 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Grok 4.1 Fast
- 41.7
- Unranked · 2 rankable rows
- Trinity-Large-Preview
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Knowledge
Not comparable- Grok 4.1 Fast
- 42.2
- Estimated · #129/181
- Trinity-Large-Preview
- Not ranked
- Basis
- BenchAlign lane · 0 vs 3 public rows
- Reading
- Not comparable
Math
Not comparable- Grok 4.1 Fast
- Not ranked
- Trinity-Large-Preview
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Grok 4.1 Fast
- Not ranked
- Trinity-Large-Preview
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Grok 4.1 Fast
- 31.1
- Unranked · 1 rankable row
- Trinity-Large-Preview
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Grok 4.1 Fast
- 41.8
- #99/120
- Trinity-Large-Preview
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Grok 4.1 Fast | Trinity-Large-Preview | Basis | Reading |
|---|---|---|---|---|
| Agentic | Not ranked | Not ranked | Not comparableBenchAlign lane · 1 vs 0 public rows | Not comparable |
| Coding | 47.5Estimated · #88/183 | Not ranked | Not comparableBenchAlign lane · 0 vs 0 public rows | Not comparable |
| Reasoning | 41.7Unranked · 2 rankable rows | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Knowledge | 42.2Estimated · #129/181 | Not ranked | Not comparableBenchAlign lane · 0 vs 3 public rows | Not comparable |
| Math | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 31.1Unranked · 1 rankable row | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Instruction following | 41.8#99/120 | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign) differ from the provisional-lane categories. Unranked scores sit on the lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
A shared-evidence shape is not available.
BenchLM does not draw a radar or infer missing axes when the matched evidence is too sparse.
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- Grok 4.1 Fast
- $0.00045
- Fits in one request
- Trinity-Large-Preview
- $0.00075
- Fits in one request
Grok 4.1 Fast has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Grok 4.1 Fast
- $0.0115
- Fits in one request
- Trinity-Large-Preview
- $0.0155
- Fits in one request
Grok 4.1 Fast has the lower modeled cost
Costs use the listed standard API rates.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- Grok 4.1 Fast
- $0.049
- Fits in one request
- Cached input priced at the published list-input rate
- Trinity-Large-Preview
- $0.065
- Fits in one request
- Cached input priced at the published list-input rate
Grok 4.1 Fast has the lower modeled cost
Grok 4.1 Fast has no published cached-input rate, so cached tokens use its listed input rate. Trinity-Large-Preview has no published cached-input rate, so cached tokens use its listed input rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGrok 4.1 FastTrinity-Large-Preview
Context window
Maximum documented context; output-token limits may be lower.
Grok 4.1 Fast
2M
Trinity-Large-Preview
512K
API model ID
Grok 4.1 Fast
Not sourced
Trinity-Large-Preview
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Grok 4.1 Fast
Not published
Trinity-Large-Preview
Not published
Documented inputs
Grok 4.1 Fast
Not sourced
Trinity-Large-Preview
Not sourced
Documented outputs
Grok 4.1 Fast
Not sourced
Trinity-Large-Preview
Not sourced
Provider availability
Grok 4.1 Fast
Not sourced
Trinity-Large-Preview
Not sourced
Reasoning profile
Grok 4.1 Fast
Non-Reasoning
Trinity-Large-Preview
Non-Reasoning
Weight access
Grok 4.1 Fast
Proprietary
Trinity-Large-Preview
Open Weight
License
Grok 4.1 Fast
Proprietary
Trinity-Large-Preview
Open Weight
Release date
Grok 4.1 Fast
2025-11-19
Trinity-Large-Preview
2026-01-27
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- The public evidence has no benchmark result shared by both models, so it does not support a quality verdict.
- Workload cost
- Repository review: $0.0115 vs $0.0155. Cache-heavy agent loop: $0.049 vs $0.065.
- Context tradeoff
- Grok 4.1 Fast has the larger documented window (2M).
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Frequently asked questions
Which is better, Grok 4.1 Fast or Trinity-Large-Preview?
The public evidence has no benchmark result shared by both models, so it does not support a quality verdict. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, Grok 4.1 Fast or Trinity-Large-Preview?
Trinity-Large-Preview is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, Grok 4.1 Fast or Trinity-Large-Preview?
Grok 4.1 Fast and Trinity-Large-Preview are not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Grok 4.1 Fast or Trinity-Large-Preview?
For the stated presets, chat costs $0.00045 on Grok 4.1 Fast and $0.00075 on Trinity-Large-Preview; repository review costs $0.0115 and $0.0155; the cache-heavy agent loop costs $0.049 and $0.065. Grok 4.1 Fast has no published cached-input rate, so cached tokens use its listed input rate. Trinity-Large-Preview has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, Grok 4.1 Fast or Trinity-Large-Preview?
Grok 4.1 Fast has the larger documented context window: 2M, compared with 512K.
Related comparisons
Last updated September 4, 2026
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