| Signal | GPT-5.3-Codex | Delta | Sonar Reasoning Pro |
|---|---|---|---|
Capabilities | 100 | +33 | |
Pricing | 14 | +6 | |
Context window size | 89 | +8 | |
Recency | 100 | +37 | |
Output Capacity | 85 | +65 | |
| Overall Result | 5 wins | of 5 | 0 wins |
30
days ranked higher
0
days
0
days ranked higher
OpenAI
Perplexity
Sonar Reasoning Pro saves you $275.00/month
That's $3300.00/year compared to GPT-5.3-Codex at your current usage level of 100K calls/month.
| Metric | GPT-5.3-Codex | Sonar Reasoning Pro | Winner |
|---|---|---|---|
| Overall Score | 85 | 62 | GPT-5.3-Codex |
| Rank | #29 | #215 | GPT-5.3-Codex |
| Quality Rank | #29 | #215 | GPT-5.3-Codex |
| Adoption Rank | #29 | #215 | GPT-5.3-Codex |
| Parameters | -- | -- | -- |
| Context Window | 400K | 128K | GPT-5.3-Codex |
| Pricing | $1.75/$14.00/M | $2.00/$8.00/M | -- |
| Signal Scores | |||
| Capabilities | 100 | 67 | GPT-5.3-Codex |
| Pricing | 14 | 8 | GPT-5.3-Codex |
| Context window size | 89 | 81 | GPT-5.3-Codex |
| Recency | 100 | 64 | GPT-5.3-Codex |
| Output Capacity | 85 | 20 | GPT-5.3-Codex |
Our composite score (0–100) combines six weighted signals: benchmark performance (25%), pricing efficiency (25%), context window size (15%), model recency (15%), output capacity (10%), and capability versatility (10%). Here's what the scores mean for these two models:
Scores 85/100 (rank #29), placing it in the top 90% of all 290 models tracked.
Scores 62/100 (rank #215), placing it in the top 26% of all 290 models tracked.
GPT-5.3-Codex has a 23-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Sonar Reasoning Pro offers 37% better value per quality point. At 1M tokens/day, you'd spend $150.00/month with Sonar Reasoning Pro vs $236.25/month with GPT-5.3-Codex - a $86.25 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Higher benchmark score (0/100) indicates stronger performance on coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Faster response time (speed score 0/100) is critical for user-facing chat. Sonar Reasoning Pro also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (400K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($8.00/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (85/100) correlates with better nuance, coherence, and style in long-form content
Image understanding & OCR
Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly
GPT-5.3-Codex clearly outperforms Sonar Reasoning Pro with a significant 23.4-point lead. For most general use cases, GPT-5.3-Codex is the stronger choice. However, Sonar Reasoning Pro may still excel in niche scenarios.
Best for Quality
GPT-5.3-Codex
Marginally better benchmark scores; both are excellent
Best for Cost
Sonar Reasoning Pro
37% lower pricing; better value at scale
Best for Reliability
GPT-5.3-Codex
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.3-Codex
Stronger community support and better developer experience
Best for Production
GPT-5.3-Codex
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-5.3-Codex | Sonar Reasoning Pro |
|---|---|---|
| Vision (Image Input) | ||
| Function Callingdiffers | ||
| Streaming | ||
| JSON Modediffers | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
OpenAI
Perplexity
Sonar Reasoning Pro saves you $6.75/month
That's 34% cheaper than GPT-5.3-Codex at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | GPT-5.3-Codex | Sonar Reasoning Pro |
|---|---|---|
| Context Window | 400K | 128K |
| Max Output Tokens | 128,000 | -- |
| Open Source | No | No |
| Created | Feb 24, 2026 | Mar 7, 2025 |
GPT-5.3-Codex scores 85/100 (rank #29) compared to Sonar Reasoning Pro's 62/100 (rank #215), giving it a 23-point advantage. GPT-5.3-Codex is the stronger overall choice, though Sonar Reasoning Pro may excel in specific areas like cost efficiency.
GPT-5.3-Codex is ranked #29 and Sonar Reasoning Pro is ranked #215 out of 290+ AI models. Rankings use a composite score combining benchmark performance (25%), pricing (25%), context window (15%), recency (15%), output capacity (10%), and versatility (10%). Scores update hourly.
Sonar Reasoning Pro is cheaper at $8.00/M output tokens vs GPT-5.3-Codex's $14.00/M output tokens - 1.8x more expensive. Input token pricing: GPT-5.3-Codex at $1.75/M vs Sonar Reasoning Pro at $2.00/M.
GPT-5.3-Codex has a larger context window of 400,000 tokens compared to Sonar Reasoning Pro's 128,000 tokens. A larger context window means the model can process longer documents and conversations.