Chat turn cost
1K fresh input + 500 output tokens
Ultramarine 1 Flash
Ultramarine 1 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Step 5 Preview vs Ultramarine 1 Flash
Updated October 14, 2026. We do not rank this pair: at least one has no public score. 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
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. 5 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 5
- Step 5 Preview only
- 17
- Ultramarine 1 Flash only
- 0
- Like-for-like categories
- 0 / 8
Estimated: Step 5 Preview. 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.
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Ultramarine 1 Flash
Ultramarine 1 Flash has the lower estimated token cost for this stated workload. Costs use the listed standard API rates.
Confidence: listed-rates
Show secondary and unsupported calls
Repository review cost
50K fresh input + 3K output tokens
Ultramarine 1 Flash
Ultramarine 1 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
Ultramarine 1 Flash is not ranked on the public lane for coding, so no winner is named for coding.
Confidence: limitedAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Ultramarine 1 Flash is not ranked on the public lane for agentic, so no winner is named for agentic.
Confidence: limitedLong documents
Prompts that approach the documented context limit
Not enough matched evidence
A complete context comparison is not sourced.
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.
60.4Step 5 Preview—Ultramarine 1 Flash
Not comparable · BenchAlign v5.8
The coding row is not comparable on the public lane: at least one model is not measured or not ranked there.
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.
17 Step 5 Preview only
5 Shared
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.
AutomationBenchAgentic
Normalized gap 6.2Step 5 Preview:44.0%Ultramarine 1 Flash:50.2%
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
Not comparable- Step 5 Preview
- 65.4
- Estimated · #18/125
- Ultramarine 1 Flash
- Not ranked
- Basis
- BenchAlign v5.8 lane · 11 vs 3 public rows
- Reading
- Not comparable
Coding
Not comparable- Step 5 Preview
- 60.4
- Estimated · #20/149
- Ultramarine 1 Flash
- Not ranked
- Basis
- BenchAlign v5.8 lane · 6 vs 2 public rows
- Reading
- Not comparable
Reasoning
Not comparable- Step 5 Preview
- 83.4
- Unranked · 2 rankable rows
- Ultramarine 1 Flash
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Step 5 Preview
- 74.6
- #24/54
- Ultramarine 1 Flash
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Knowledge
Not comparable- Step 5 Preview
- 68.5
- Supported · #22/181
- Ultramarine 1 Flash
- Not ranked
- Basis
- BenchAlign v5.8 lane · 2 vs 0 public rows
- Reading
- Not comparable
Multilingual
Not comparable- Step 5 Preview
- Not ranked
- Ultramarine 1 Flash
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Instruction following
Not comparable- Step 5 Preview
- Not ranked
- Ultramarine 1 Flash
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Step 5 Preview
- Not ranked
- Ultramarine 1 Flash
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Step 5 Preview | Ultramarine 1 Flash | Basis | Reading |
|---|---|---|---|---|
| Agentic | 65.4Estimated · #18/125 | Not ranked | Not comparableBenchAlign v5.8 lane · 11 vs 3 public rows | Not comparable |
| Coding | 60.4Estimated · #20/149 | Not ranked | Not comparableBenchAlign v5.8 lane · 6 vs 2 public rows | Not comparable |
| Reasoning | 83.4Unranked · 2 rankable rows | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multimodal | 74.6#24/54 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Knowledge | 68.5Supported · #22/181 | Not ranked | Not comparableBenchAlign v5.8 lane · 2 vs 0 public rows | Not comparable |
| Multilingual | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Instruction following | Not ranked | Not ranked | 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
- Step 5 Preview
- $0.00235
- Fits in one request
- Ultramarine 1 Flash
- $0.0004
- Fit state unavailable
Ultramarine 1 Flash has the lower modeled cost
Costs use the listed standard API rates.
Repository review
50K fresh input + 3K output tokens
- Step 5 Preview
- $0.0581
- Fits in one request
- Ultramarine 1 Flash
- $0.009
- Fit state unavailable
Ultramarine 1 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
- Step 5 Preview
- $0.057
- Fits in one request
- Ultramarine 1 Flash
- $0.014
- Fit state unavailable
Ultramarine 1 Flash has the lower modeled cost
Costs use the listed standard API rates.
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.
SpecificationStep 5 PreviewUltramarine 1 Flash
Context window
Maximum documented context; output-token limits may be lower.
Step 5 Preview
Ultramarine 1 Flash
Not sourced
Paper Instruments Ultramarine APIAPI model ID
Step 5 Preview
step-5-preview
StepFun Step 5 Preview model documentationUltramarine 1 Flash
ultramarine-1-flash
Paper Instruments Ultramarine APICached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Step 5 Preview
$0.05 per 1M cached input tokens
StepFun pricing and rate limitsUltramarine 1 Flash
$0.03 per 1M cached input tokens
Paper Instruments public pricing endpointDocumented inputs
Step 5 Preview
text, image, video
StepFun Step 5 Preview model documentationUltramarine 1 Flash
text, image
Paper Instruments Ultramarine APIDocumented outputs
Step 5 Preview
Ultramarine 1 Flash
Provider availability
Step 5 Preview
Preview · StepFun Open Platform API
StepFun Step 5 Preview model documentationUltramarine 1 Flash
Generally Available · Paper Instruments API
Paper Instruments Ultramarine availabilityReasoning profile
Step 5 Preview
Reasoning
Ultramarine 1 Flash
Reasoning
Weight access
Step 5 Preview
Pending
Ultramarine 1 Flash
Proprietary
License
Step 5 Preview
Pending
Ultramarine 1 Flash
Proprietary
Release date
Step 5 Preview
2026-09-20
Ultramarine 1 Flash
2026-10-14
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
- At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner.
- Workload cost
- Repository review: $0.0581 vs $0.009. Cache-heavy agent loop: $0.057 vs $0.014.
- Context tradeoff
- A complete documented context comparison is not available.
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, Step 5 Preview or Ultramarine 1 Flash?
At least one model is not scored in the current public ranking lane, so the page does not name an overall quality winner. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, Step 5 Preview or Ultramarine 1 Flash?
Ultramarine 1 Flash is not ranked on the public lane for coding, so no winner is named for coding.
Which is better for agentic tasks, Step 5 Preview or Ultramarine 1 Flash?
Ultramarine 1 Flash is not ranked on the public lane for agentic tasks, so no winner is named for agentic tasks.
Which costs less, Step 5 Preview or Ultramarine 1 Flash?
For the stated presets, chat costs $0.00235 on Step 5 Preview and $0.0004 on Ultramarine 1 Flash; repository review costs $0.0581 and $0.009; the cache-heavy agent loop costs $0.057 and $0.014. Costs use the listed standard API rates.
Which has the larger context window, Step 5 Preview or Ultramarine 1 Flash?
A complete documented context-window comparison is not available.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence22 rows
Agentic
Terminal-Bench 2.1
Step 5 Preview85.0%SourceUltramarine 1 Flash83.2%SourceStep 5 Preview leads this result
Terminal-Bench 4.0
Step 5 Preview33.30%SourceUltramarine 1 Flash—Not directly comparable
CyberGym
Step 5 Preview84.7%SourceUltramarine 1 Flash—Not directly comparable
AutomationBench
Step 5 Preview44.0%SourceUltramarine 1 Flash50.2%SourceUltramarine 1 Flash leads this result
Toolathlon-Verified
Step 5 Preview74.1%SourceUltramarine 1 Flash—Not directly comparable
MCP Atlas
Step 5 Preview85.6%SourceUltramarine 1 Flash—Not directly comparable
JobBench
Step 5 Preview59.0%SourceUltramarine 1 Flash62.9%SourceUltramarine 1 Flash leads this result
APEX-Agents
Step 5 Preview37.8%SourceUltramarine 1 Flash—Not directly comparable
DRACO
Step 5 Preview83.3%SourceUltramarine 1 Flash—Not directly comparable
BrowseComp
Step 5 Preview88.7%SourceUltramarine 1 Flash—Not directly comparable
Agents' Last Exam
Step 5 Preview29.5%SourceUltramarine 1 Flash—Not directly comparable
Coding
DeepSWE
Step 5 Preview67.7%SourceUltramarine 1 Flash61.5%SourceStep 5 Preview leads this result
Terminal-Bench 2.1
Step 5 Preview85.0%SourceUltramarine 1 Flash83.2%SourceStep 5 Preview leads this result
SciCode
Step 5 Preview58.9%SourceUltramarine 1 Flash—Not directly comparable
ProgramBench
Step 5 Preview80.5%SourceUltramarine 1 Flash—Not directly comparable
sweMarathon
Step 5 Preview72.7%SourceUltramarine 1 Flash—Not directly comparable
MLS-Bench Lite
Step 5 Preview40.5%SourceUltramarine 1 Flash—Not directly comparable
Reasoning
CritPt
Step 5 Preview20.9%SourceUltramarine 1 Flash—Not directly comparable
Multimodal
Knowledge
22 public results · 5 shared
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Last updated October 14, 2026