Step 3.5 Flash
No volume over the last 7 days. Weekly share peaked at 8.0% in the week of Mar 9, 2026, with 12T tokens processed since Feb 2, 2026.
- Launch
- Jan 29, 2026
- Context
- 256k tokens
- Modality
- text → text
- Reasoning
- yes
- License
- Open weights
- Input
- $0.10 / 1M
- Output
- $0.30 / 1M
Weekly token share
Share of the router's weekly volume, since the first week with volume
See the numbers
| Week | Share |
|---|---|
| Oct 19, 2026 | 0.000% |
| Oct 12, 2026 | 0.000% |
| Oct 5, 2026 | 0.000% |
| Sep 28, 2026 | 0.000% |
| Sep 21, 2026 | 0.000% |
| Sep 14, 2026 | 0.000% |
| Sep 7, 2026 | 0.000% |
| Aug 31, 2026 | 0.000% |
| Aug 24, 2026 | 0.000% |
| Aug 17, 2026 | 0.000% |
| Aug 10, 2026 | 0.000% |
| Aug 3, 2026 | 0.000% |
| Jul 27, 2026 | 0.000% |
| Jul 20, 2026 | 0.000% |
| Jul 13, 2026 | 0.000% |
| Jul 6, 2026 | 0.000% |
| Jun 29, 2026 | 0.000% |
| Jun 22, 2026 | 0.000% |
| Jun 15, 2026 | 0.000% |
| Jun 8, 2026 | 0.000% |
| Jun 1, 2026 | 0.000% |
| May 25, 2026 | 0.039% |
| May 18, 2026 | 2.291% |
| May 11, 2026 | 2.633% |
| May 4, 2026 | 2.032% |
| Apr 27, 2026 | 3.154% |
| Apr 20, 2026 | 3.291% |
| Apr 13, 2026 | 1.774% |
| Apr 6, 2026 | 2.843% |
| Mar 30, 2026 | 4.876% |
| Mar 23, 2026 | 6.815% |
| Mar 16, 2026 | 7.387% |
| Mar 9, 2026 | 8.028% |
| Mar 2, 2026 | 5.053% |
| Feb 23, 2026 | 3.251% |
| Feb 16, 2026 | 2.725% |
| Feb 9, 2026 | 2.031% |
| Feb 2, 2026 | 0.667% |
Debuted in the week of Feb 2, 2026 and peaked at 8.0% 5 weeks later. No volume was recorded in the latest full week.
What this model is used for new
Tasks where the model ranks among the leaders, and its share of each
This model is not among the leaders in any of the 29 tasks classified in the Oct 25, 2026 snapshot. That does not mean it goes unused: the source lists only the largest models in each task.
Snapshot of the rolling 7-day window through Oct 25, 2026. Share: the model's tokens in the task over the task's total tokens. Weight: the task's share of classified volume.
Where to run it
Endpoints in the source's catalog, from cheapest to most expensive on input
No endpoints listed for this model in the archived catalog.
Benchmarks
Artificial Analysis indexes and benchmarks run by the source, with cost per task
The source has not run its own benchmarks on this model.
Artificial Analysis indexes, exposed by the catalog; benchmarks run by the source and archived on Oct 26, 2026. The gray mark is the median of evaluated models.
Against the week's largest models
The five largest proprietary and five largest open-weights models over the last 7 days
| Model | Lab | 7-day share | Blended price | Context | Intelligence | Weeks in top 10 |
|---|---|---|---|---|---|---|
| Proprietary | ||||||
| GPT-6 LunaOpenAI | OpenAI | 4.4% | $0.20 | 1M | 38.1 | 5 |
| Claude Opus 5.5Anthropic | Anthropic | 4.4% | $8.00 | 1M | 57.6 | 3 |
| jev-1.13Typesafe | Typesafe | 1.6% | — | — | — | 0 |
| GPT-6.1 SolOpenAI | OpenAI | 1.5% | $4.00 | 1M | 51.8 | 0 |
| Muse Spark 1.3 ContributorMeta | Meta | 1.5% | $0.125 | 1M | — | 0 |
| Open weights | ||||||
| DeepSeek V4.1 Flash 1017DeepSeek | DeepSeek | 17.9% | $0.263 | 1M | 39.5 | 1 |
| DeepSeek V4.1 FlashDeepSeek | DeepSeek | 9.6% | $0.265 | 1M | 24.7 | 7 |
| MiniMax M3.1 FlashMiniMax | MiniMax | 7.7% | $0.263 | 1M | 42.7 | 1 |
| GLM 5.3 FlashZ.ai (GLM) | Z.ai (GLM) | 7.0% | $0.237 | 1M | 41.8 | 9 |
| Hy4 previewTencent | Tencent | 4.8% | $1.25 | 1M | — | 8 |
| Step 3.5 Flashthis pageStepFun | StepFun | — | $0.15 | 256k | 17.0 | 9 |
Share over the last 7 days (Oct 19, 2026 to Oct 25, 2026). Blended price in US dollars per million tokens, weighted 75% input and 25% output. A dash means the number is not published, not zero.