Data points: 67
The readout for Gemini 2.5 Flash and GPT-OSS, before the detailed comparison sheet.
Decision read
GPT-OSS
GPT-OSS currently has the stronger profile, with verified wins split 2 to 4.
Evidence depth
67 data points
Includes 0 benchmark rows, 0 audit samples, and 10 provider examples.
Selection signal
Start with GPT-OSS
The charts below split 10 high-signal samples across speed, scores, and audit health.
Switch either side of this report to compare another model with the same LMSpeed data pipeline.
Select a different model to open a new comparison URL.
Model compare Gemini 2.5 Flash vs GPT-OSSgemini-2-5-flash-vs-gpt-oss | Model A Gemini 2.5 Flash | Model B GPT-OSS |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 2 wins | 4 wins |
| Where it leads | Cheapest input price, Provider coverage |
Third-party benchmark profile synced into LMSpeed; only metrics available for both models are shown.
Compare benchmark category scores on a 0-100 scale. Select a category to inspect the gap.
Avg. score
Gemini 2.5 Flash
50
Avg. score
GPT-OSS
-
Selected category
Agents
Gemini 2.5 Flash
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
No shared professional benchmark scores are available yet.
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Gemini 2.5 Flash | GPT-OSS |
|---|---|---|
| No completed audits are available from shared providers yet. | ||
Speed aggregates and input/output pricing share each provider row for real API selection and migration cost checks.
| Provider | Gemini 2.5 Flash | GPT-OSS |
|---|---|---|
100 tests | Gemini 2.5 Flash speed / latency 190 tok/s / 6776ms input / output No data |
This report only uses LMSpeed data for Gemini 2.5 Flash and GPT-OSS: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Gemini 2.5 Flash | GPT-OSS |
|---|---|---|
| When to choose each model | Gemini 2.5 Flash Gemini 2.5 Flash is stronger when you prioritize Cheapest input price, Provider coverage. | GPT-OSS GPT-OSS is stronger when you prioritize Average speed, First-token latency, Free providers, Recent tests. |
TL;DR: GPT-OSS leads across 67 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Gemini 2.5 Flash vs GPT-OSS into nearby model comparisons with enough verified LMSpeed data.
| Average speed, First-token latency, Free providers, Recent tests |
| Model metadata | Gemini 2.5 Flash exposes 1.0M tokens; notable signals: Text input, Image input, File input, Audio input. | GPT-OSS exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, Reasoning. |
|---|---|---|
| Developer | No data | |
| Context window | 1.0M tokens | 131.1K tokens |
| Max output | 65.5K tokens | 131.1K tokens |
| Released | Jun 2025 | Aug 2025 |
| Modalities | Input FileImageTextAudiovideo Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputAudio inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingReasoning |
| Parameters | No data | 120B |
| Tokenizer | Gemini | GPT |
| Knowledge cutoff | 2025-01-31 | 2024-06-30 |
| OpenRouter ID | google/gemini-2.5-flash | openai/gpt-oss-120b:free |
| References | No data | No data |
GPT-OSS
speed / latency
198 tok/s / 7216ms
input / output
No data
OpenRouter50 tests | Gemini 2.5 Flash speed / latency 141 tok/s / 2052ms input / output No data | GPT-OSS speed / latency 41 tok/s / 2851ms input / output No data |
|---|
素墨API40 tests | Gemini 2.5 Flash speed / latency 136 tok/s / 11323ms input / output No data | GPT-OSS speed / latency 347 tok/s / 2670ms input / output No data |
|---|
小水管 API30 tests | Gemini 2.5 Flash speed / latency N/A / N/A input / output No data | GPT-OSS speed / latency 1047 tok/s / 867ms input / output No data |
|---|
Rnglg2 API25 tests | Gemini 2.5 Flash speed / latency 189 tok/s / 11433ms input / output No data | GPT-OSS speed / latency 338 tok/s / 2317ms input / output No data |
|---|
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0/M / $0/M | GPT-OSS gpt-oss:120b speed / latency No data input / output $0/M / $0/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0001/M / $0.0013/M | GPT-OSS gpt-oss-20b speed / latency No data input / output $0.037/M / $0.075/M |
Gemini 2.5 Flash gemini-2.5-flash speed / latency No data input / output $0.0001/M / $0.0013/M | GPT-OSS gpt-oss-20b speed / latency No data input / output $0.037/M / $0.075/M |
Gemini 2.5 Flash gemini-2.5-flash-c speed / latency No data input / output $0.0027/M / $0.0027/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.034/M / $0.095/M |
Gemini 2.5 Flash gemini-2.5-flash-c speed / latency No data input / output $0.0050/M / $0.0050/M | GPT-OSS gpt-oss-120b speed / latency No data input / output $0.800/M / $3.20/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
