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Every score has a dated snapshot.

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  3. OpenAI: GPT-3.5 Turbo Instruct vs GPT-4.5 Orion

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

OpenAI: GPT-3.5 Turbo Instruct vs GPT-4.5 Orion benchmark

In this head-to-head showdown, OpenAI: GPT-3.5 Turbo Instruct is more budget-friendly at $2/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Both OpenAI: GPT-3.5 Turbo Instruct and GPT-4.5 Orion present distinct architectural strengths. Compare the verified benchmark matrix below to choose the model tailored to your specific application requirements.
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Executive Verdict Summary

OpenAI: GPT-3.5 Turbo Instruct holds empirical advantage (2 of 3 metrics)

Coding / SWESWE-bench
GPT-4.5 OrionTop code solve rate
ReasoningGPQA / Live
GPT-4.5 OrionTop logical accuracy
Best Value$/1M Tok
OpenAI: GPT-3.5 Turbo InstructLowest API billing cost
Speed / TokTok/Sec
GPT-4.5 OrionFastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

OpenAI: GPT-3.5 Turbo Instruct (2)GPT-4.5 Orion (1)
OpenAI: GPT-3.5 Turbo Instruct
2 of 3 Wins
✓Input price✓Output price
GPT-4.5 Orion
1 of 3 Wins
✓Context window
OpenAI
Leads 2 of 3
OpenAI: GPT-3.5 Turbo Instruct

Auto-discovered from OpenRouter (openai/gpt-3.5-turbo-instruct). Preview until a second source matches.

In: $1.5 · Out: $2/1M
OpenAI
Leads 1 of 3
GPT-4.5 Orion

OpenAI largest dense non-reasoning model with expansive world knowledge and reduced hallucinations.

Elo 1,540In: $75 · Out: $150/1M
Top Rival Showdowns for OpenAI: GPT-3.5 Turbo Instruct
All Matchups
Compare vs:vs Claude Opus 4.5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderOpenAI: GPT-3.5 Turbo Instruct Wins

OpenAI: GPT-3.5 Turbo Instruct

$2 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

OpenAI: GPT-3.5 Turbo Instruct (2)vsGPT-4.5 Orion (8)
OpenAI: GPT-3.5 Turbo Instruct: 2W (20%)Overall: GPT-4.5 OrionGPT-4.5 Orion: 8W (80%)
← OpenAI: GPT-3.5 Turbo InstructGPT-4.5 Orion →
🏆GPT-4.5 Orion Leads(5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Benchmark
OpenAI: GPT-3.5 Turbo InstructvsGPT-4.5 Orion
Preference Elo
—vs1,540
Coding Elo
—vs1,520
SWE-bench
—vs71%
LiveBench
—vs68.5%
GPQA Diamond
—vs84%
OpenAI: GPT-3.5 Turbo Instruct: 0WGPT-4.5 Orion: 5W
🏆GPT-4.5 Orion Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
OpenAI: GPT-3.5 Turbo InstructvsGPT-4.5 Orion
Output speed
—vs60 tok/s
Time to first token
—vs350 ms
OpenAI: GPT-3.5 Turbo Instruct: 0WGPT-4.5 Orion: 2W
🏆OpenAI: GPT-3.5 Turbo Instruct Leads(2/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
OpenAI: GPT-3.5 Turbo InstructvsGPT-4.5 Orion
Output price
$2/1Mvs$150/1M+$148/1M
Input price
$1.5/1Mvs$75/1M+$73.5/1M
Context window
4kvs128k+124k
OpenAI: GPT-3.5 Turbo Instruct: 2WGPT-4.5 Orion: 1W

Side-by-Side Benchmark Matrix

OpenAI: GPT-3.5 Turbo InstructGPT-4.5 Orion
Preference Elo
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion1,540
Coding Elo
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion1,520
LiveBench
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion68.5%
SWE-bench
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion71%
GPQA Diamond
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion84%
Time to first token
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion350 ms
Output speed
OpenAI: GPT-3.5 Turbo Instruct—
GPT-4.5 Orion60 tok/s
Input priceOpenAI: GPT-3.5 Turbo Instruct +$73.5/1M
OpenAI: GPT-3.5 Turbo Instruct$1.5/1M
GPT-4.5 Orion$75/1M
Output priceOpenAI: GPT-3.5 Turbo Instruct +$148/1M
OpenAI: GPT-3.5 Turbo Instruct$2/1M
GPT-4.5 Orion$150/1M
Context windowGPT-4.5 Orion +124k
OpenAI: GPT-3.5 Turbo Instruct4k
GPT-4.5 Orion128k
BenchmarkOpenAI: GPT-3.5 Turbo InstructGPT-4.5 OrionAdvantage Delta
Preference Elo—
1,540
lmarena · Aug 17, 2026
—
Coding Elo—
1,520
lmarena · Aug 17, 2026
—
LiveBench—
68.5%
livebench · Aug 17, 2026
—
SWE-bench—
71%
swebench · Aug 17, 2026
—
GPQA Diamond—
84%
seed-bootstrap · Aug 1, 2026
—
Time to first token—
350 ms
seed-bootstrap · Aug 1, 2026
—
Output speed—
60 tok/s
seed-bootstrap · Aug 1, 2026
—
Input price
$1.5/1M
openrouter · Aug 17, 2026
$75/1M
seed-bootstrap · Aug 1, 2026
+$73.5/1M
Output price
$2/1M
openrouter · Aug 17, 2026
$150/1M
seed-bootstrap · Aug 1, 2026
+$148/1M
Context window
4k
openrouter · Aug 17, 2026
128k
seed-bootstrap · Aug 1, 2026
+124k

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 98% with OpenAI: GPT-3.5 Turbo Instruct
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
OpenAI: GPT-3.5 Turbo Instruct$82.50 / mo
In: $52.5Out: $30
GPT-4.5 Orion$4,875.00 / mo
In: $2,625Out: $2,250
Estimated Cost Delta

OpenAI: GPT-3.5 Turbo Instruct is estimated to save $4,792.50/month ($57,510/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    OpenAI: GPT-3.5 Turbo Instruct:Pick OpenAI: GPT-3.5 Turbo Instruct when you are optimizing output cost.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatOpenAI: GPT-3.5 Turbo Instruct

Lower output list price ($2/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGGPT-4.5 Orion

Larger window (128k).

Screenshots / visionGPT-4.5 Orion

GPT-4.5 Orion is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatOpenAI: GPT-3.5 Turbo InstructLower output list price ($2/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGGPT-4.5 OrionLarger window (128k).
Screenshots / visionGPT-4.5 OrionGPT-4.5 Orion is the side marked multimodal in the catalog.

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
OpenAI

OpenAI: GPT-3.5 Turbo Instruct

Elo n/a
SWE-bench—
Speed (tok/s)4k
Input / 1M Tokens$1.5/1M
Output / 1M Tokens$2/1M
OpenAI

GPT-4.5 Orion

Elo 1,540
SWE-bench71%
Speed (tok/s)60 tok/s
Input / 1M Tokens$75/1M
Output / 1M Tokens$150/1M

Frequently Asked Questions

Which is better overall, OpenAI: GPT-3.5 Turbo Instruct or GPT-4.5 Orion?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, OpenAI: GPT-3.5 Turbo Instruct or GPT-4.5 Orion?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
OpenAI: GPT-3.5 Turbo Instruct output tokens are $2/1M versus $150/1M. Input prices and retry rates still move the real bill.
Which is faster, OpenAI: GPT-3.5 Turbo Instruct or GPT-4.5 Orion?
We do not have TTFT for both models.
Which has the larger context window?
GPT-4.5 Orion accepts 128k tokens versus 4k.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. OpenAI: GPT-3.5 Turbo Instruct and GPT-4.5 Orion Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Similar Head-to-Head Comparisons

All OpenAI: GPT-3.5 Turbo Instruct matchups →|All GPT-4.5 Orion matchups →
GPT-4.5 Orion vs OpenAI: o1 (previous gpt-flagship)GPT-4.5 Orion vs GPT-5 (next gpt-flagship)GPT-5.6 Sol vs GPT-4.5 OrionGPT-5.6 Terra vs GPT-4.5 OrionGPT-5 mini vs GPT-4.5 OrionGPT-4o vs GPT-4.5 Orion