OpenAI GPT OSS 20b
Official model page not yet on record
Listed price on OpenRouter ↗Ranked 50 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 0.09% to 0.17% across 12 tracked weeks.
Per one million tokens. Cached input is listed at $0.009.
Reasoning, tool calling and structured output are supported.
Published price, translated into a workload.
Live per-token pricing via OpenRouter, verified 17 Oct 2026. Batch and long-context tiers are not published in the feed, so they are omitted rather than estimated.
No cached-input price is published for this model, so cached tokens are costed at the full input rate. The cached-input amount is therefore an upper-bound estimate, not an observed discount.
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.
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 | ✓ 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
- #50
- Peak rank
- #32
- Routed share
- 0.17%
- Peak share
- 0.42%
- Weeks ranked
- 0
- First tracked
- 4 May 2026
- Region of origin
- US · United States
- Provider
- OpenAI
- Model family
- Not yet on record
- Release date
- Not yet on record
- Type
- Text
- Modalities
- text
- Context window
- 131K tokens
- Weights
- Open weight
- License
- Not yet on record
Median provider uptime across OpenRouter endpoints, last 30 days. Latency and throughput are not published by the source and are not estimated here.
Observed first. Interpreted only when sourced.
In the week ending 11 Sep 2026, OpenAI GPT OSS 20b fell 18 places to #50 with 0.17% of routed tokens and a peak rank of #32. Over 12 tracked weeks its routed share has moved from 0.09% to 0.17% (+0.08 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.
What changed around this model.
Dated developments concerning this model and its provider. Facts, evidence status and yellow3 analysis remain separate.
Measured observation
OpenAI GPT OSS 20b reached its highest recorded routed share.
Rank moved from #42 to #32 as routed share reached 0.42% in the seven days ending 4 Sep 2026. The record does not assign a cause.
ConcernsModel · OpenAI GPT OSS 20bOpen signal Close signalAdoption moveRank#42#32Routed share0.22%0.42%Evidence statusMeasured observationBefore and after recordedSource and datesOpenRouter routing rankingsOpen original source for OpenRouter routing rankings (opens in a new tab)Event datePublication dateNot disclosedLatest verificationWhy it mattersNo interpretation is published for this signal. The observation stands on its own.
Related contextEvidence boundaryFact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.Corrections: none recordedMeasured observation
OpenAI GPT OSS 20b recorded its largest weekly rise.
Rank moved from #61 to #42 as routed share reached 0.22% in the seven days ending 28 Aug 2026. The record does not assign a cause.
ConcernsModel · OpenAI GPT OSS 20bOpen signal Close signalAdoption moveRank#61#42Routed share0.02%0.22%Evidence statusMeasured observationBefore and after recordedSource and datesOpenRouter routing rankingsOpen original source for OpenRouter routing rankings (opens in a new tab)Event datePublication dateNot disclosedLatest verificationWhy it mattersNo interpretation is published for this signal. The observation stands on its own.
Related contextEvidence boundaryFact, source and yellow3 interpretation remain separate. Sequence is not converted into causation.Corrections: none recorded
OpenRouter usage represents routed developer traffic, not the whole AI market. Timing near an adoption change does not establish causation. Sources checked for this record: OpenRouter routed-traffic rankings, OpenRouter listed price. Provider announcements and independent reporting are not yet monitored and are absent rather than nil.
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 |
|---|---|---|---|---|---|---|
| 11 Sep 2026 | #50 | 0.17% | -0.24 | ▼ 18places down | #27 | ranked |
| 4 Sep 2026 | #32 | 0.42% | +0.19 | ▲ 10places up | #15 | ranked |
| 28 Aug 2026 | #42 | 0.22% | +0.20 | ▲ 19places up | #23 | ranked |
| 21 Aug 2026 | #61 | 0.02% | -0.11 | ▼ 7places down | #36 | ranked |
| 14 Aug 2026 | #54 | 0.14% | -0.08 | ▼ 8places down | #36 | ranked |
| 7 Aug 2026 | #46 | 0.22% | +0.18 | ▲ 16places up | #29 | ranked |
| 31 Jul 2026 | #62 | 0.03% | – | NEW | #38 | RE-ENTRY |
| 17 Jul 2026 | #43 | 0.23% | -0.05 | –no change | #30 | ranked |
| 10 Jul 2026 | #43 | 0.28% | – | NEW | #27 | RE-ENTRY |
| 26 Jun 2026 | #56 | 0.06% | – | NEW | #30 | RE-ENTRY |
| 22 May 2026 | #60 | 0.05% | -0.04 | ▼ 7places down | #35 | ranked |
| 15 May 2026 | #53 | 0.09% | – | NEW | #30 | NEW |
| Date | Input / 1M | Output / 1M | Change | Source |
|---|---|---|---|---|
| 22 Sep 2026 | $0.018 | $0.090 | Not established | OpenRouter listed price |
| 17 Sep 2026 | $0.030 | $0.13 | — | OpenRouter listed price |
This model is listed on more than one OpenRouter endpoint. Price observations recorded before 17 September 2026 did not identify the endpoint, so they could not be attributed reliably and have been withdrawn. Price history for this model includes only observations recorded from 17 September 2026, when yellow3 began recording the endpoint with each observation. See the correction record.
OpenRouter publishes one headline price per model, and that price follows whichever provider it is currently routing to. At the latest reading this model was offered by 11 providers at prices from $0.018 to $0.075 per million input tokens. A move in the headline therefore does not establish that anyone changed a price. yellow3 records the providers charging the listed price with every observation and reports a change only where a provider charging the earlier price is charging the new one. Observations recorded before 23 September 2026 do not name the provider, so the prices are published and no change is derived from them.
- 4 May 2026First trackedDerived from yellow3 routed-traffic data
- 28 Aug 2026Biggest weekly rise +19 placesDerived from yellow3 routed-traffic data
- 4 Sep 2026Peak routed share 0.42%Derived from yellow3 routed-traffic data
- 11 Sep 2026Biggest weekly fall -18 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.