Data points: 48
The readout for Aion 2.0 and GPT-5.3 Codex, before the detailed comparison sheet.
Decision read
GPT-5.3 Codex
GPT-5.3 Codex currently has the stronger profile, with verified wins split 0 to 4.
Evidence depth
48 data points
Includes 1 benchmark rows, 0 audit samples, and 5 provider examples.
Selection signal
Start with GPT-5.3 Codex
The charts below split 6 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 Aion 2.0 vs GPT-5.3 Codexaion-2-0-vs-gpt-5-3-codex | Model A Aion 2.0 | Model B GPT-5.3 Codex |
|---|---|---|
| Overall leader | Contender | Leading |
| Verified metric wins | 0 wins | 4 wins |
| Where it leads | No data | Cheapest input price, Free providers, Provider coverage, Recent tests |
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
Aion 2.0
-
Avg. score
GPT-5.3 Codex
58.2
Selected category
Agents
GPT-5.3 Codex
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
Aion 2.0
5.0
Rank #122/127 · confidence 1
GPT-5.3 Codex
winner82.0
Rank #11/127 · confidence 1 · eval date 2026-02-05
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | Aion 2.0 | GPT-5.3 Codex |
|---|---|---|
| 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 | Aion 2.0 | GPT-5.3 Codex |
|---|---|---|
0 tests | Aion 2.0 speed / latency N/A / N/A input / output No data | GPT-5.3 Codex |
This report only uses LMSpeed data for Aion 2.0 and GPT-5.3 Codex: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | Aion 2.0 | GPT-5.3 Codex |
|---|---|---|
| When to choose each model | Aion 2.0 Aion 2.0 does not clearly lead on the verified metrics here, so check provider-specific pricing before choosing. | GPT-5.3 Codex GPT-5.3 Codex is stronger when you prioritize Cheapest input price, Free providers, Provider coverage, Recent tests. |
TL;DR: GPT-5.3 Codex leads across 48 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from Aion 2.0 vs GPT-5.3 Codex into nearby model comparisons with enough verified LMSpeed data.
| Model metadata | Aion 2.0 exposes 131.1K tokens; notable signals: Text input, Text output, Tool calling, JSON mode. | GPT-5.3 Codex exposes 400K tokens; notable signals: Text input, Image input, File input, Text output. |
|---|---|---|
| Developer | AionLabs | OpenAI |
| Context window | 131.1K tokens | 400K tokens |
| Max output | 32.8K tokens | 128K tokens |
| Released | Feb 2026 | Feb 2026 |
| Modalities | Input Text Output Text | Input TextImageFile Output Text |
| Features | Text inputText outputTool callingJSON modeReasoning | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning |
| Parameters | No data | No data |
| Tokenizer | Other | GPT |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | aion-labs/aion-2.0 | openai/gpt-5.3-codex |
| References | No data | No data |
speed / latency
N/A / N/A
input / output
No data
Dext API0 tests | Aion 2.0 aion-labs/aion-2.0 speed / latency N/A / N/A input / output $0.033/M/$0.066/M | GPT-5.3 Codex gpt-5.3-codex speed / latency N/A / N/A input / output $0.144/M/$1.15/M |
|---|
LiteRouter0 tests | Aion 2.0 speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
OpenRouter0 tests | Aion 2.0 speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
OpenRouter Fans0 tests | Aion 2.0 speed / latency N/A / N/A input / output No data | GPT-5.3 Codex speed / latency N/A / N/A input / output No data |
|---|
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
