Long documents
Prompts that approach the documented context limit
Grok 4.20
Grok 4.20 has the larger documented context window.
Confidence: documented
Grok 4.20 vs Step 3.7 Flash
Updated October 14, 2026. Rank says Grok 4.20 is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.
Both of these models will change. Get the price, version and retirement notices for the pair, each with its source. Follow model changes
Share or export
Decision reading
Grok 4.20 has the higher public point estimate, 57.65 versus 43.74. Their conditional score ranges overlap. These ranges do not establish rank confidence. 4 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 4
- Grok 4.20 only
- 19
- Step 3.7 Flash only
- 7
- Like-for-like categories
- 0 / 8
Estimated: Grok 4.20 and Step 3.7 Flash. Conditional ranges do not establish rank confidence.How the comparison works
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.
Chat turn cost
1K fresh input + 500 output tokens
Step 3.7 Flash
Step 3.7 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesCache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Step 3.7 Flash
Step 3.7 Flash has the lower estimated token cost for this stated workload. Step 3.7 Flash 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
Step 3.7 Flash
Step 3.7 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-ratesCoding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Step 3.7 Flash is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.
Confidence: limitedAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Step 3.7 Flash is scored on Estimated evidence for agentic, so the reading is directional rather than like-for-like.
Confidence: limited
Which one for a specific job
Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.
The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.
21.6Grok 4.2030.2Step 3.7 Flash
Directional only · BenchAlign v5.8
Step 3.7 Flash has the higher coding point estimate. Conditional score ranges do not establish rank confidence.
Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.
Same basis rules as the category table below
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
19 Grok 4.20 only
4 Shared
7 Step 3.7 Flash only
3 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
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.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
SWE-bench ProCoding
Normalized gap 4.5Grok 4.20:51.8%Step 3.7 Flash:56.3%
Bars run 0–100 on each benchmark’s normalized display scale
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign v5.8 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.
Agentic
Directional only- Grok 4.20
- 25.4
- Supported · #100/125
- Step 3.7 Flash
- 37.3
- Estimated · #73/125
- Basis
- BenchAlign v5.8 lane · 4 vs 7 public rows
- Reading
- Directional only
Coding
Directional only- Grok 4.20
- 21.6
- Supported · #117/149
- Step 3.7 Flash
- 30.2
- Estimated · #95/149
- Basis
- BenchAlign v5.8 lane · 6 vs 2 public rows
- Reading
- Directional only
Knowledge
Directional only- Grok 4.20
- 52.7
- Supported · #68/181
- Step 3.7 Flash
- 45.0
- Estimated · #95/181
- Basis
- BenchAlign v5.8 lane · 6 vs 0 public rows
- Reading
- Directional only
Reasoning
Not comparable- Grok 4.20
- 44.9
- Unranked · 2 rankable rows
- Step 3.7 Flash
- 76.5
- Unranked · 2 rankable rows
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Grok 4.20
- 53.4
- #47/54
- Step 3.7 Flash
- 75.4
- Unranked · 3 rankable rows
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Grok 4.20
- Not ranked
- Step 3.7 Flash
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Grok 4.20
- Not ranked
- Step 3.7 Flash
- 82.1
- #54/144
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Grok 4.20
- Not ranked
- Step 3.7 Flash
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Grok 4.20 | Step 3.7 Flash | Basis | Reading |
|---|---|---|---|---|
| Agentic | 25.4Supported · #100/125 | 37.3Estimated · #73/125 | Directional onlyBenchAlign v5.8 lane · 4 vs 7 public rows | Directional only |
| Coding | 21.6Supported · #117/149 | 30.2Estimated · #95/149 | Directional onlyBenchAlign v5.8 lane · 6 vs 2 public rows | Directional only |
| Knowledge | 52.7Supported · #68/181 | 45.0Estimated · #95/181 | Directional onlyBenchAlign v5.8 lane · 6 vs 0 public rows | Directional only |
| Reasoning | 44.9Unranked · 2 rankable rows | 76.5Unranked · 2 rankable rows | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Multimodal | 53.4#47/54 | 75.4Unranked · 3 rankable rows | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Instruction following | Not ranked | 82.1#54/144 | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Math | Not ranked | 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 v5.8) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Supported evidence per lane · bars run 0–100Methodology
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 4.20
- $0.0025
- Fits in one request
- Step 3.7 Flash
- $0.00077
- Fits in one request
Step 3.7 Flash has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Grok 4.20
- $0.07
- Fits in one request
- Step 3.7 Flash
- $0.01345
- Fits in one request
Step 3.7 Flash 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 4.20
- $0.09
- Fits in one request
- Step 3.7 Flash
- $0.0555
- Fits in one request
- Cached input priced at the published list-input rate
Step 3.7 Flash has the lower modeled cost
Step 3.7 Flash has no published cached-input rate, so cached tokens use its listed input rate.
Cached input falls back to the list input rate only where a cached rate is unpublished
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGrok 4.20Step 3.7 Flash
Context window
Maximum documented context; output-token limits may be lower.
Grok 4.20
1M
Step 3.7 Flash
256K
API model ID
Grok 4.20
Not sourced
Step 3.7 Flash
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Grok 4.20
$0.2 per 1M cached input tokens
Step 3.7 Flash
Not published
Documented inputs
Grok 4.20
Not sourced
Step 3.7 Flash
Not sourced
Documented outputs
Grok 4.20
Not sourced
Step 3.7 Flash
Not sourced
Provider availability
Grok 4.20
Not sourced
Step 3.7 Flash
Not sourced
Reasoning profile
Grok 4.20
Reasoning
Step 3.7 Flash
Reasoning
Weight access
Grok 4.20
Proprietary
Step 3.7 Flash
Open Weight
License
Grok 4.20
Proprietary
Step 3.7 Flash
Open Weight
Release date
Grok 4.20
2026-03-10
Step 3.7 Flash
2026-05-29
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
- Grok 4.20 has the higher public point estimate, 57.65 versus 43.74. Their conditional score ranges overlap. These ranges do not establish rank confidence.
- Workload cost
- Repository review: $0.07 vs $0.01345. Cache-heavy agent loop: $0.09 vs $0.0555.
- Context tradeoff
- Grok 4.20 has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, Grok 4.20 or Step 3.7 Flash?
Grok 4.20 has the higher public point estimate, 57.65 versus 43.74. Their conditional score ranges overlap. These ranges do not establish rank confidence. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, Grok 4.20 or Step 3.7 Flash?
Step 3.7 Flash scores higher for coding on the public lane, 30.2 to 21.6. Step 3.7 Flash is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which is better for agentic tasks, Grok 4.20 or Step 3.7 Flash?
Step 3.7 Flash scores higher for agentic tasks on the public lane, 37.3 to 25.4. Step 3.7 Flash is scored on Estimated evidence for agentic tasks, so the reading is directional rather than like-for-like. BenchLM does not name a winner for agentic tasks from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which costs less, Grok 4.20 or Step 3.7 Flash?
For the stated presets, chat costs $0.0025 on Grok 4.20 and $0.00077 on Step 3.7 Flash; repository review costs $0.07 and $0.01345; the cache-heavy agent loop costs $0.09 and $0.0555. Step 3.7 Flash has no published cached-input rate, so cached tokens use its listed input rate.
Which has the larger context window, Grok 4.20 or Step 3.7 Flash?
Grok 4.20 has the larger documented context window: 1M, compared with 256K.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence30 rows
Agentic
Terminal-Bench 2.0
Grok 4.2047.1%SourceStep 3.7 Flash—Not directly comparable
DeepSearchQA
Grok 4.2062.8%SourceStep 3.7 Flash92.8%SourceStep 3.7 Flash leads this result
Gert Labs
Shared sourceGrok 4.2038.36%Step 3.7 Flash51.57%Step 3.7 Flash leads this result
Terminal-Bench 2.1 (Vals)
Grok 4.2044.2%SourceStep 3.7 Flash—Not directly comparable
Terminal-Bench 2.1
Grok 4.20—Step 3.7 Flash59.5%SourceNot directly comparable
BrowseComp
Grok 4.20—Step 3.7 Flash75.8%SourceNot directly comparable
Toolathlon
Grok 4.20—Step 3.7 Flash49.5%SourceNot directly comparable
Claw-Eval
Grok 4.20—Step 3.7 Flash67.1%SourceNot directly comparable
HLE w/ tools
Grok 4.20—Step 3.7 Flash47.2%SourceNot directly comparable
Coding
LiveCodeBench Pro
Grok 4.2074.2%SourceStep 3.7 Flash—Not directly comparable
SWE-bench Verified
Grok 4.2076.7%SourceStep 3.7 Flash—Not directly comparable
SWE-bench Pro
Grok 4.2051.8%SourceStep 3.7 Flash56.3%SourceStep 3.7 Flash leads this result
Vibe Code Bench
Grok 4.204.06%SourceStep 3.7 Flash—Not directly comparable
LiveCodeBench (Vals)
Grok 4.2084.3%SourceStep 3.7 Flash—Not directly comparable
SWE-bench (Vals)
Grok 4.2072.2%SourceStep 3.7 Flash—Not directly comparable
Terminal-Bench 2.1
Grok 4.20—Step 3.7 Flash59.5%SourceNot directly comparable
Reasoning
Multimodal
MMMU-Pro
Grok 4.2075.2%SourceStep 3.7 Flash—Not directly comparable
CharXiv
Grok 4.2060.9%SourceStep 3.7 Flash—Not directly comparable
ERQA
Grok 4.2054.1%SourceStep 3.7 Flash—Not directly comparable
SimpleVQA
Grok 4.2057.4%SourceStep 3.7 Flash79.2%SourceStep 3.7 Flash leads this result
MedXpertQA (MM)
Grok 4.2065.8%SourceStep 3.7 Flash—Not directly comparable
V*
Grok 4.20—Step 3.7 Flash95.3%SourceNot directly comparable
Knowledge
GPQA-D
Grok 4.2088.5%SourceStep 3.7 Flash—Not directly comparable
HLE w/o tools
Grok 4.2031.6%SourceStep 3.7 Flash—Not directly comparable
HealthBench Hard
Grok 4.2020.3%SourceStep 3.7 Flash—Not directly comparable
MedXpertQA (Text)
Grok 4.2050.2%SourceStep 3.7 Flash—Not directly comparable
GPQA Diamond (Vals)
Grok 4.2088.6%SourceStep 3.7 Flash—Not directly comparable
MMLU-Pro (Vals)
Grok 4.2086.3%SourceStep 3.7 Flash—Not directly comparable
30 public results · 4 shared
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Last updated October 14, 2026