Data points: 94
Model compare
The readout for GPT-5.3 Codex and MiMo-V2-Flash, before the detailed comparison sheet.
Weighted outcome: GPT-5.3 Codex. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Decision read
GPT-5.3 Codex
GPT-5.3 Codex has the higher weighted result; Model A / B score 90 to 10.
Evidence depth
94 data points
Includes 15 benchmark rows, 0 audit samples, and 8 provider examples.
Selection signal
Start with GPT-5.3 Codex
The charts below split 23 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.
This report only uses LMSpeed data for GPT-5.3 Codex and MiMo-V2-Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Model compare | GPT-5.3 Codex | MiMo-V2-Flash |
|---|---|---|
| Overall leader | Leading | Contender |
| Weighted overall score | 90.0 pts | 10.0 pts |
| Benchmark category leads | 5 categories | 0 categories |
| Operational advantages | Free providers, Provider coverage | Average speed, First-token latency |
| Context window | 400K tokens | 262.1K tokens |
| Max output | 128K tokens | 65.5K tokens |
| Modalities | Input TextImageFile Output Text |
The overall result weights benchmark capability categories at 80% and price, API speed/latency, and availability at 20%. Recent test volume does not affect the winner, and missing benchmark categories are excluded.
| Model compare | GPT-5.3 Codex | MiMo-V2-Flash |
|---|---|---|
| Developer | OpenAI | No data |
| Released | Feb 2026 | Dec 2025 |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | No data | No data |
| OpenRouter ID | openai/gpt-5.3-codex | xiaomi/mimo-v2-flash |
| References | No data | No data |
This report only uses LMSpeed data for GPT-5.3 Codex and MiMo-V2-Flash: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
GPT-5.3 Codex
GPT-5.3 Codex is stronger in benchmark categories (Agents, Coding, Reasoning, Knowledge, Instruction following) and operational dimensions (Free providers, Provider coverage).
MiMo-V2-Flash
MiMo-V2-Flash has these operational advantages: Average speed, First-token latency.
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
GPT-5.3 Codex
56.7
Avg. score
MiMo-V2-Flash
47.1
GPT-5.3 Codex leads by 5.4
GPT-5.3 Codex leads by 7.7
GPT-5.3 Codex leads by 12.1
GPT-5.3 Codex leads by 15.2
MiMo-V2-Flash
No data
No data
GPT-5.3 Codex leads by 11.5
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.3 Codex
winner65.0
Rank #21/83 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
59.0
Rank #35/83 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner74.0
Rank #5/89 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
31.3
Rank #79/89 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner91.5%
Rank #11/187 · confidence 4
MiMo-V2-Flash
83.5%
Rank #56/187 · confidence 4
GPT-5.3 Codex
winner39.9%
Rank #12/186 · confidence 4
MiMo-V2-Flash
20.0%
Rank #55/186 · confidence 4
GPT-5.3 Codex
winner85.0
Rank #5/43 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
73.4
Rank #30/43 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner53.2%
Rank #10/184 · confidence 4
MiMo-V2-Flash
38.3%
Rank #87/184 · confidence 4
GPT-5.3 Codex
winner53.2
Rank #14/96 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
25.9
Rank #91/96 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner62.9
Rank #17/64 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
54.7
Rank #39/64 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner51.8
Rank #8/90 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
15.2
Rank #85/90 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner39.9
Rank #11/96 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
8.0
Rank #72/96 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner91.5
Rank #12/96 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
65.6
Rank #82/96 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner44.3
Rank #16/99 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
24.7
Rank #66/99 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner86.9
Rank #23/90 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
75.1
Rank #47/90 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner75.4
Rank #21/86 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
39.9
Rank #70/86 · confidence 1 · eval date 2026-03-15
GPT-5.3 Codex
winner86.0
Rank #41/84 · confidence 1 · eval date 2026-02-05
MiMo-V2-Flash
83.9
Rank #48/84 · confidence 1 · eval date 2026-03-15
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.3 Codex | MiMo-V2-Flash |
|---|---|---|
| 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 | GPT-5.3 Codex | MiMo-V2-Flash |
|---|---|---|
25 tests | GPT-5.3 Codex speed / latency 56 tok/s / 4621ms input / output No data | MiMo-V2-Flash speed / latency N/A / N/A input / output No data |
10 tests | GPT-5.3 Codex speed / latency |
Weighted outcome: GPT-5.3 Codex. Benchmark capability categories carry 80%, while price, API performance, and availability carry 20%.
Input
Output
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingJSON modeReasoning |
|---|
201 tok/s / 2135ms
input / output
No data
MiMo-V2-Flash speed / latency N/A / N/A input / output No data |
Moyanjdc API5 tests | GPT-5.3 Codex speed / latency N/A / N/A input / output No data | MiMo-V2-Flash speed / latency 85 tok/s / 5951ms input / output No data |
|---|
Seamee API5 tests | GPT-5.3 Codex speed / latency 53 tok/s / 3889ms input / output No data | MiMo-V2-Flash speed / latency N/A / N/A input / output No data |
|---|
ZenMux5 tests | GPT-5.3 Codex speed / latency N/A / N/A input / output No data | MiMo-V2-Flash speed / latency 102 tok/s / 4215ms input / output No data |
|---|
GPT-5.3 Codex gpt-5.3-codex speed / latency No data input / output $0.050/request | MiMo-V2-Flash MiMo-V2-Flash speed / latency No data input / output $0.010/request |
GPT-5.3 Codex gpt-5.3-codex speed / latency No data input / output $0.240/M/$1.92/M | MiMo-V2-Flash mimo-v2-flash speed / latency No data input / output $0.011/M/$0.033/M |
GPT-5.3 Codex gpt-5.3-codex speed / latency No data input / output $0.048/M/$0.384/M | MiMo-V2-Flash mimo-v2-flash speed / latency No data input / output $0.019/M/$0.038/M |
