GPT-4.5
GPT-4.5 is a legacy integration reference; evaluate GPT-6 Luna before starting new work.
- Family
- GPT-4.5
- Released
- 2025-02-27
- Context
- 8K
- Knowledge cutoff
- 2025-04
- Openness
- Proprietary
- License
- ProprietaryRestricted
- Weights
- Not released
- Code
- Unknown
No tracked provider pricing is available yet.
No tracked provider pricing is available yet.
This model is deprecated. OpenAI recommends switching to GPT-6 Luna.
About
Improved GPT-4 variant released March 2026. Enhanced performance over GPT-4o with better reasoning and code generation.
Providers(2)
Compare all 2Compare API pricing across 2 tracked provider routes for input and output tokens, batch, and cached reads when available.
| Provider | Input / 1M | Output / 1M | Route |
|---|---|---|---|
| OpenAI API | - | - | ServerlessPartial |
| Azure OpenAI | - | - | ServerlessPartial |
Available via routers & gateways(16)
LiteLLM
GatewayOpen-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.
OpenRouter
HybridUnified hybrid gateway to 500+ models from 80+ providers via a single OpenAI-compatible API, with an optional Auto Router that selects a model per prompt from market spend data.
Portkey
GatewayProduction AI gateway routing to 1,600+ LLMs with failover, load balancing, caching, and guardrails; MIT-licensed open-source core is self-hostable. Now part of Palo Alto Networks as Prisma AIRS AI Gateway.
AIRouter
RouterCommercial LLM router (branded "AI Router" on its site) that picks the best model per request via a Decision API or an OpenAI-compatible Chat Completions endpoint, with a private selection mode that routes on anonymized patterns; sold as BYOK subscription plans priced by routed tokens.
Azure AI Foundry Model Router
RouterMicrosoft Azure AI Foundry's native model router that uses a trained ML model to route each prompt in real time to the optimal Azure-hosted model, with Balanced/Cost/Quality mode selection and automatic failover.
Helicone
GatewayObservability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache-2.0 open-source platform with a managed hosted tier for logging and analytics.
Capabilities
Benchmark peer barsfor Classification
Benchmark scores(3)
| Benchmark | Score | Version | Evaluation | Source |
|---|---|---|---|---|
| 86.1 | —Observed 2026-04-14 | — | ||
| 71.4 | —Observed 2025-02-27 | — | ||
| 1394.0 | text creative_writing 2026-10-22Observed 2026-10-22 | Configuration: GPT-4.5 Preview (2025-02-27) Harness: LMArena blind pairwise human votes, Bradley-Terry Evaluator: LMArena Confidence: confirmed Notes: LMArena Text arena, Creative Writing category (no style control), board published 2026-10-22 (HF lmarena-ai/leaderboard-dataset @a467e6b9, text config, latest split). Board entry 'GPT-4.5 Preview (2025-02-27)' (category creative_writing in text/latest-00000-of-00001.parquet): rank 110 of 416, rating 1393.6 (95% CI 1381.6-1405.5), 2618 votes. The board entry or catalog model carries a Preview/Beta/Experimental label. LLM Reference model is lifecycle-deprecated; score kept as historical. Source: LMArena (CC BY 4.0). Retrieved 2026-10-27. | Source Source: LMArena (lmarena.ai), CC BY 4.0 |
Migration checks
No linked migration route is available for this model yet.