LLM Leaderboard
GPT-5.3-Codex
by OpenAI Reasoning
RunFree Score
—
insufficient data
Blended price
$4.81
per 1M tokens
Context
400K
tokens
Max output
128K
tokens
Output speed
—
tokens / sec
Latency (TTFT)
—
first token
Uptime
98.7%
last 24h
Providers
2
serving this model
Capability profile
Not enough categorised benchmark data to chart a profile yet.
Compare GPT-5.3-Codex
See it side by side with any other model — benchmarks, price and specs.
Benchmark results
We don't have verified public benchmark results for GPT-5.3-Codex yet. We only publish scores with a primary source — no estimates.
Every score links to its original source. See our methodology for how the RunFree Score is computed.
API pricing
- Input
- $1.75 / 1M
- Output
- $14.00 / 1M
- Cached input
- $0.17 / 1M
- Blended (3:1)
- $4.81 / 1M
Specifications
- Provider
- OpenAI
- Context window
- 400K
- Max output
- 128K
- Reasoning model
- Yes
- Modality
- multimodal
- Released
- Feb 24, 2026