GPT-4o-mini vs Step 3.7 Flash
GPT-4o-mini (2024) and Step 3.7 Flash (2026) are frontier reasoning models from OpenAI and StepFun. GPT-4o-mini ships a 128k-token context window, while Step 3.7 Flash ships a 256k-token context window. On pricing, GPT-4o-mini costs $0.15/1M input tokens versus $0.20/1M for the alternative. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Step 3.7 Flash is safer overall; choose GPT-4o-mini when provider fit matters.
Decision scorecard
Local evidence first| Signal | GPT-4o-mini | Step 3.7 Flash |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps, multimodal apps, and tool-calling agents |
| Decision fit | RAG, Long context, and Vision | Coding, RAG, and Agents |
| Context window | 128k | 256k |
| Cheapest output | $0.60/1M tokens | $1.15/1M tokens |
| Provider routes | 4 tracked | 3 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- GPT-4o-mini has the lower cheapest tracked output price at $0.60/1M tokens.
- GPT-4o-mini has broader tracked provider coverage for fallback and route flexibility.
- Local decision data tags GPT-4o-mini for RAG, Long context, and Vision.
- Step 3.7 Flash has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Step 3.7 Flash uniquely exposes Vision, Multimodal, and Reasoning in local model data.
- Local decision data tags Step 3.7 Flash for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-4o-mini
$270
Cheapest tracked route/tier: OpenAI API
Step 3.7 Flash
$448
Cheapest tracked route/tier: StepFun
Estimated monthly gap: $178. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Step 3.7 Flash is $0.55/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Step 3.7 Flash adds Vision, Multimodal, and Reasoning in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- GPT-4o-mini is $0.55/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-07-18 | 2026-05-29 |
| Context window | 128k | 256k |
| Parameters | — | 198B (11B active) |
| Architecture | Decoder Only | Mixture of Experts |
| License | Proprietary | Proprietary |
| Openness | Proprietary | Proprietary |
| Weights | Not released | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2023-10 | - |
Pricing and availability
| Pricing attribute | GPT-4o-mini | Step 3.7 Flash |
|---|---|---|
| Input price | $0.15/1M tokens | $0.20/1M tokens |
| Output price | $0.60/1M tokens | $1.15/1M tokens |
| Providers |
Capabilities
| Capability | GPT-4o-mini | Step 3.7 Flash |
|---|---|---|
| Vision | No | Yes |
| Multimodal | No | Yes |
| Reasoning | No | Yes |
| JSON / Tool use | No | Yes |
| Structured outputs | Yes | Yes |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
No shared benchmark scores are currently available for this pair.
Continue comparing
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.