| Signal | GPT-5.3 Chat | Delta | Grok Code Fast 1 |
|---|---|---|---|
Capabilities | 83 | -- | |
Benchmarks | 88 | +88 | |
Pricing | 86 | -12 | |
Context window size | 81 | -5 | |
Recency | 100 | +14 | |
Output Capacity | 70 | +4 | |
| Overall Result | 3 wins | of 6 | 2 wins |
Score History
87.4
current score
GPT-5.3 Chat
right now
40
current score
OpenAI
xAI
Grok Code Fast 1 saves you $780.00/month
That's $9360.00/year compared to GPT-5.3 Chat at your current usage level of 100K calls/month.
| Metric | GPT-5.3 Chat | Grok Code Fast 1 | Winner |
|---|---|---|---|
| Overall Score | 87 | 40 | GPT-5.3 Chat |
| Rank | #17 | #257 | GPT-5.3 Chat |
| Quality Rank | #17 | #257 | GPT-5.3 Chat |
| Adoption Rank | #17 | #257 | GPT-5.3 Chat |
| Parameters | -- | -- | -- |
| Context Window | 128K | 256K | Grok Code Fast 1 |
| Pricing | $1.75/$14.00/M | $0.20/$1.50/M | -- |
| Signal Scores | |||
| Capabilities | 83 | 83 | GPT-5.3 Chat |
| Benchmarks | 88 | -- | GPT-5.3 Chat |
| Pricing | 86 | 99 | Grok Code Fast 1 |
| Context window size | 81 | 86 | Grok Code Fast 1 |
| Recency | 100 | 86 | GPT-5.3 Chat |
| Output Capacity | 70 | 67 | GPT-5.3 Chat |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Learn more about our methodology.
Scores 87/100 (rank #17), placing it in the top 94% of all 290 models tracked.
Scores 40/100 (rank #257), placing it in the top 12% of all 290 models tracked.
GPT-5.3 Chat has a 47-point advantage, which typically translates to noticeably stronger performance on complex reasoning, code generation, and multi-step tasks.
Grok Code Fast 1 offers 89% better value per quality point. At 1M tokens/day, you'd spend $25.50/month with Grok Code Fast 1 vs $236.25/month with GPT-5.3 Chat - a $210.75 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
Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Suitable for user-facing chat with competitive response times. Grok Code Fast 1 also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (256K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($1.50/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (87/100) 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 Chat clearly outperforms Grok Code Fast 1 with a significant 47.400000000000006-point lead. For most general use cases, GPT-5.3 Chat is the stronger choice. However, Grok Code Fast 1 may still excel in niche scenarios.
Best for Quality
GPT-5.3 Chat
Marginally better benchmark scores; both are excellent
Best for Cost
Grok Code Fast 1
89% lower pricing; better value at scale
Best for Reliability
GPT-5.3 Chat
Higher uptime and faster response speeds
Best for Prototyping
GPT-5.3 Chat
Stronger community support and better developer experience
Best for Production
GPT-5.3 Chat
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | GPT-5.3 Chat | Grok Code Fast 1 |
|---|---|---|
| Vision (Image Input)differs | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoningdiffers | ||
| Web Search | ||
| Image Output |
OpenAI
xAI
Grok Code Fast 1 saves you $17.79/month
That's 89% cheaper than GPT-5.3 Chat 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 Chat | Grok Code Fast 1 |
|---|---|---|
| Context Window | 128K | 256K |
| Max Output Tokens | 16,384 | 10,000 |
| Open Source | No | No |
| Created | Mar 3, 2026 | Aug 26, 2025 |