Llama 3 8B Instruct vs Step 3.5 Flash
Llama 3 8B Instruct (2024) and Step 3.5 Flash (2026) are frontier reasoning models from AI at Meta and StepFun. Llama 3 8B Instruct ships a 8k-token context window, while Step 3.5 Flash ships a 256k-token context window. On pricing, Llama 3 8B Instruct costs $0.02/1M input tokens versus $0.10/1M 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.
Llama 3 8B Instruct is ~400% cheaper at $0.02/1M; pay for Step 3.5 Flash only for reasoning depth.
Decision scorecard
Local evidence first| Signal | Llama 3 8B Instruct | Step 3.5 Flash |
|---|---|---|
| Best for | provider-routed production | reasoning-heavy apps |
| Decision fit | Coding, Classification, and JSON / Tool use | Coding, Agents, and Long context |
| Context window | 8k | 256k |
| Cheapest output | $0.05/1M tokens | $0.30/1M tokens |
| Provider routes | 17 tracked | 1 tracked |
| Shared benchmarks | 0 shared | 0 shared |
Decision tradeoffs
- Llama 3 8B Instruct has the lower cheapest tracked output price at $0.05/1M tokens.
- Llama 3 8B Instruct has broader tracked provider coverage for fallback and route flexibility.
- Llama 3 8B Instruct uniquely exposes Structured outputs in local model data.
- Local decision data tags Llama 3 8B Instruct for Coding, Classification, and JSON / Tool use.
- Step 3.5 Flash has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Step 3.5 Flash uniquely exposes Reasoning in local model data.
- Local decision data tags Step 3.5 Flash for Coding, Agents, and Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Llama 3 8B Instruct
$28.50
Cheapest tracked route/tier: DeepInfra
Step 3.5 Flash
$155
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $127. 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 3.5 Flash is $0.25/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- Check replacement coverage for Structured outputs before moving production traffic.
- Step 3.5 Flash adds Reasoning in local capability data.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Llama 3 8B Instruct is $0.25/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Reasoning before moving production traffic.
- Llama 3 8B Instruct adds Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2024-04-18 | 2026-01-29 |
| Context window | 8k | 256k |
| Parameters | 8B | 196B (11B active) |
| Architecture | Decoder Only | Mixture of Experts |
| License | Llama 3 Community | Proprietary |
| Openness | Open weights | Proprietary |
| Weights | Available | Not released |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2023-03 | - |
Pricing and availability
| Pricing attribute | Llama 3 8B Instruct | Step 3.5 Flash |
|---|---|---|
| Input price | $0.02/1M tokens | $0.10/1M tokens |
| Output price | $0.05/1M tokens | $0.30/1M tokens |
| Providers |
Capabilities
| Capability | Llama 3 8B Instruct | Step 3.5 Flash |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | No | Yes |
| JSON / Tool use | No | No |
| Structured outputs | Yes | No |
| 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: 2026-07-11. Data sourced from public model cards and provider documentation.