OpenAI GPT OSS 20b
Official model page not yet on record
Official pricing ↗Ranked 49 of the tracked routed-model set.
What the evidence shows today.
The page leads with what has been observed, then separates price, capability and history so a buyer can see both the signal and its limits.
Routed share moved from 0.04% to 0.21% across 12 tracked weeks.
Per one million tokens. Cached input is not publicly disclosed.
Reasoning and structured output are supported.
Published price, translated into a workload.
Live per-token pricing via OpenRouter, verified 10 Sep 2026. Batch and long-context tiers are not published in the feed, so they are omitted rather than estimated.
An estimate from published per-token pricing and your assumptions. Actual costs vary by provider and usage tier.
Same workload as the calculator above, at each model's current price. Monthly USD.
Every point is an observed week.
Routed-token share over time, with no interpolation presented as evidence. A price line joins it as real changes are recorded.
Low cost · adoption falling. Observed relationship, not proof of causation.
What it supports, and what remains undisclosed.
Verified support, explicit non-support and missing disclosure read differently on purpose. A blank is never made to look like a negative finding.
| Context window | 131K |
| Reasoning | ✓ Supported |
| Tool calling | — Not supported |
| Structured output | ✓ Supported |
| Image input | — Not supported |
| Audio input | — Not supported |
| Video input | — Not supported |
| Open weights | ✓ Yes |
| API availability | ✓ Yes |
| Commercial license | Verify terms with the provider |
- Current rank
- #49
- Peak rank
- #28
- Routed share
- 0.21%
- Peak share
- 0.45%
- Weeks ranked
- 7
- First tracked
- 4 May 2026
- Region of origin
- US · United States
- Provider
- OpenAI
- Model family
- Not publicly disclosed
- Release date
- Not publicly disclosed
- Type
- Text
- Modalities
- text
- Context window
- 131K tokens
- Weights
- Open weight
- License
- Not publicly disclosed
Availability monitoring is derived from OpenRouter provider uptime; it refreshes with the daily build. Latency and throughput are not exposed by the data source, so we do not report them rather than estimate.
Observed first. Interpreted only when sourced.
In the week ending 10 Sep 2026, OpenAI GPT OSS 20b fell 21 places to #49 with 0.21% of routed tokens and a peak rank of #28. Over 12 tracked weeks its routed share has moved from 0.04% to 0.21% (+0.17 pp).
A sourced weekly interpretation of what is driving this model's routing is added as the record accumulates. yellow3 does not publish a reason for movement unless the routed-traffic data or a cited source supports it.
The record behind the headline.
The current position stays connected to every observed week, price change and milestone.
| Week ending | Rank | Routed share | Δ share | Movement | Region rank | Status |
|---|---|---|---|---|---|---|
| 10 Sep 2026 | #49 | 0.21% | -0.24 | ▼ 21places down | #26 | ranked |
| 3 Sep 2026 | #28 | 0.45% | +0.28 | ▲ 17places up | #13 | ranked |
| 27 Aug 2026 | #45 | 0.17% | +0.15 | ▲ 15places up | #27 | ranked |
| 20 Aug 2026 | #60 | 0.02% | -0.14 | ▼ 11places down | #36 | ranked |
| 13 Aug 2026 | #49 | 0.17% | -0.03 | ▼ 2places down | #33 | ranked |
| 6 Aug 2026 | #47 | 0.19% | +0.16 | ▲ 13places up | #31 | ranked |
| 30 Jul 2026 | #60 | 0.03% | – | NEW | #36 | RE-ENTRY |
| 16 Jul 2026 | #39 | 0.30% | +0.09 | ▲ 9places up | #27 | ranked |
| 9 Jul 2026 | #48 | 0.21% | – | NEW | #28 | RE-ENTRY |
| 25 Jun 2026 | #53 | 0.06% | – | NEW | #29 | RE-ENTRY |
| 21 May 2026 | #58 | 0.10% | +0.06 | ▲ 5places up | #34 | ranked |
| 14 May 2026 | #63 | 0.04% | – | NEW | #33 | NEW |
| Date | Input / 1M | Output / 1M | Change | Source |
|---|---|---|---|---|
| 1 Sep 2026 | $0.050 | $0.20 | — | OpenRouter listed price |
Price history begins when yellow3 started tracking this model and accrues one point per change from here. Only real, observed price changes are recorded.
- 4 May 2026First trackedDerived from yellow3 routed-traffic data
- 3 Sep 2026Peak routed share 0.45%Derived from yellow3 routed-traffic data
- 3 Sep 2026Biggest weekly rise +17 placesDerived from yellow3 routed-traffic data
- 10 Sep 2026Biggest weekly fall -21 placesDerived from yellow3 routed-traffic data
Every claim keeps its route back to evidence.
Region reflects where the model's developer is headquartered. Figures are OpenRouter routing traffic, aggregated over a trailing seven days - developer routing behaviour, not the whole market.
Follow the model, not the launch cycle.
The public record shows today's evidence. yellow3 Model Intelligence adds longer history, watchlists, alerts, comparisons and decision reporting.