Data points: 126
The readout for GPT-5.4 and Kimi K2, before the detailed comparison sheet.
Decision read
GPT-5.4
GPT-5.4 currently has the stronger profile, with verified wins split 5 to 1.
Evidence depth
126 data points
Includes 30 benchmark rows, 0 audit samples, and 9 provider examples.
Selection signal
Start with GPT-5.4
The charts below split 39 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 GPT-5.4 vs Kimi K2gpt-5-4-vs-kimi-k2 | Model A GPT-5.4 | Model B Kimi K2 |
|---|---|---|
| Overall leader | Leading | Contender |
| Verified metric wins | 5 wins | 1 wins |
| Where it leads | Cheapest input price, Average speed, 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
GPT-5.4
66.6
Avg. score
Kimi K2
57.2
Selected category
Coding
GPT-5.4 leads by 32.9
Metric-level scores with benchmark source, rank depth, confidence, error, and evaluation date where available.
GPT-5.4
winner88.0
Rank #5/81 · confidence 4 · eval date 2026-03-05
Kimi K2
41.0
Rank #53/81 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner157.4 tok/s
Rank #18/83 · confidence 4
Kimi K2
23.8 tok/s
Rank #82/83 · confidence 4
GPT-5.4
112.86 s
Rank #81/83 · confidence 4
Kimi K2
winner1.51 s
Rank #27/83 · confidence 4
GPT-5.4
112.86 s
Rank #82/83 · confidence 4
Kimi K2
winner1.51 s
Rank #41/83 · confidence 4
GPT-5.4
$15.00/M
Rank #79/96 · confidence 4
Kimi K2
winner$2.50/M
Rank #45/96 · confidence 4
GPT-5.4
$5.63/M
Rank #79/96 · confidence 4
Kimi K2
winner$1.07/M
Rank #46/96 · confidence 4
GPT-5.4
$2.50/M
Rank #78/96 · confidence 4
Kimi K2
winner$0.600/M
Rank #46/96 · confidence 4
GPT-5.4
winner74.0
Rank #4/56 · confidence 4 · eval date 2026-03-05
Kimi K2
51.0
Rank #39/56 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner92.0%
Rank #4/104 · confidence 4
Kimi K2
76.7%
Rank #56/104 · confidence 4
GPT-5.4
winner41.6%
Rank #6/104 · confidence 4
Kimi K2
6.3%
Rank #69/104 · confidence 4
GPT-5.4
winner57.3
Rank #1/60 · confidence 4 · eval date 2026-03-05
Kimi K2
22.1
Rank #48/60 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner56.6
Rank #2/62 · confidence 4 · eval date 2026-03-05
Kimi K2
34.5
Rank #50/62 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner57.6
Rank #2/58 · confidence 4 · eval date 2026-03-05
Kimi K2
15.9
Rank #45/58 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner56.6%
Rank #3/102 · confidence 4
Kimi K2
30.7%
Rank #81/102 · confidence 4
GPT-5.4
winner87.2
Rank #9/68 · confidence 4 · eval date 2026-03-05
Kimi K2
53.4
Rank #41/68 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner94.4
Rank #5/51 · confidence 4 · eval date 2026-03-05
Kimi K2
51.3
Rank #38/51 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner92.0
Rank #2/62 · confidence 4 · eval date 2026-03-05
Kimi K2
76.6
Rank #40/62 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner41.6
Rank #3/62 · confidence 4 · eval date 2026-03-05
Kimi K2
7.0
Rank #44/62 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner50.0
Rank #4/57 · confidence 4 · eval date 2026-03-05
Kimi K2
26.8
Rank #31/57 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner56.8
Rank #4/65 · confidence 4 · eval date 2026-03-05
Kimi K2
26.3
Rank #48/65 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner98.5
Rank #4/66 · confidence 4 · eval date 2026-03-05
Kimi K2
56.0
Rank #39/66 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner88.6
Rank #12/57 · confidence 4 · eval date 2026-03-05
Kimi K2
74.2
Rank #34/57 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner1269.0
Rank #17/46 · confidence 4 · eval date 2026-03-05
Kimi K2
1096.0
Rank #39/46 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner96.0
Rank #1/56 · confidence 4 · eval date 2026-03-05
Kimi K2
83.5
Rank #19/56 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner73.9
Rank #11/59 · confidence 4 · eval date 2026-03-05
Kimi K2
41.5
Rank #42/59 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner68.0
Rank #3/56 · confidence 4 · eval date 2026-03-05
Kimi K2
24.3
Rank #47/56 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner58.7
Rank #3/51 · confidence 4 · eval date 2026-03-05
Kimi K2
1.2
Rank #51/51 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner1674.0
Rank #4/56 · confidence 4 · eval date 2026-03-05
Kimi K2
525.0
Rank #51/56 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner84.5
Rank #6/68 · confidence 4 · eval date 2026-03-05
Kimi K2
30.2
Rank #57/68 · confidence 1 · eval date 2025-07-01
GPT-5.4
winner87.1
Rank #17/57 · confidence 4 · eval date 2026-03-05
Kimi K2
61.1
Rank #40/57 · confidence 1 · eval date 2025-07-01
Latest completed audits from shared providers, with four safety and integrity score groups plus report links.
| Provider | GPT-5.4 | Kimi K2 |
|---|---|---|
| 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-5.4 | Kimi K2 |
|---|---|---|
5 tests | GPT-5.4 speed / latency 428 tok/s / 4171ms input / output No data |
This report only uses LMSpeed data for GPT-5.4 and Kimi K2: pricing, speed aggregates, third-party benchmark scores, and shared provider samples.
| Guidance | GPT-5.4 | Kimi K2 |
|---|---|---|
| When to choose each model | GPT-5.4 GPT-5.4 is stronger when you prioritize Cheapest input price, Average speed, Free providers, Provider coverage, Recent tests. | Kimi K2 Kimi K2 is stronger when you prioritize First-token latency. |
TL;DR: GPT-5.4 leads across 126 verifiable data points, including pricing, speed, latency, benchmarks, and provider examples.
Continue from GPT-5.4 vs Kimi K2 into nearby model comparisons with enough verified LMSpeed data.
| First-token latency |
| Model metadata | GPT-5.4 exposes 1.1M tokens; notable signals: Text input, Image input, File input, Text output. | Kimi K2 exposes 262.1K tokens; notable signals: Text input, Text output, Tool calling, Structured outputs. |
|---|---|---|
| Developer | OpenAI | Moonshot AI |
| Context window | 1.1M tokens | 262.1K tokens |
| Max output | 128K tokens | 262.1K tokens |
| Released | Mar 2026 | Sep 2025 |
| Modalities | Input TextImageFile Output Text | Input Text Output Text |
| Features | Text inputImage inputFile inputText outputTool callingStructured outputsJSON modeReasoning | Text inputText outputTool callingStructured outputsJSON mode |
| Parameters | No data | No data |
| Tokenizer | GPT | Other |
| Knowledge cutoff | No data | 2024-12-31 |
| OpenRouter ID | openai/gpt-5.4 | moonshotai/kimi-k2-0905 |
| References | No data | No data |
Kimi K2
speed / latency
N/A / N/A
input / output
No data
Chlink API5 tests | GPT-5.4 speed / latency 50 tok/s / 5476ms input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
SmokeDivine AI5 tests | GPT-5.4 speed / latency 44 tok/s / 1119ms input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
七牛云5 tests | GPT-5.4 speed / latency 54 tok/s / 2003ms input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
天絮 API5 tests | GPT-5.4 speed / latency 46 tok/s / 3291ms input / output No data | Kimi K2 speed / latency N/A / N/A input / output No data |
|---|
GPT-5.4 gpt-5.4-free speed / latency No data input / output $0/M / $0/M | Kimi K2 kimi-k2-0905-preview speed / latency No data input / output $150.00/M / $600.00/M |
GPT-5.4 gpt-5.4-high speed / latency No data input / output $0.050/M / $0.050/M | Kimi K2 kimi-k2-0905 speed / latency No data input / output $0.010/M / $0.010/M |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.027/M / $0.027/M | Kimi K2 kimi-k2 speed / latency No data input / output $10.27/M / $10.27/M |
GPT-5.4 gpt-5.4 speed / latency No data input / output $0.034/M / $0.205/M | Kimi K2 kimi-k2-0905 speed / latency No data input / output $1.03/M / $1.03/M |
Rankings are based on community-submitted tests and periodic health probes. Advisory only, not official data.
